The mass after drying becomes (100% - 40%) of 90 kg
60% of 90 kg = 54 kg
Dana05 answered the question on October 16, 2019 at 13:11
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Water in a refrigerator cooled at a constant rate of 25% per hour. If it's temperature was 40°C originally, what was its temperature after 3...
(Solved)
Water in a refrigerator cooled at a constant rate of 25% per hour. If it's temperature was 40°C originally, what was its temperature after 3 hours?
Date posted:
October 16, 2019
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Answers (1)
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Mary spent sh 7,200 from her salary in July. She had spent 20% less in June. How much money had she spent in the two...
(Solved)
Mary spent sh 7,200 from her salary in July. She had spent 20% less in June. How much money had she spent in the two months?
Date posted:
October 16, 2019
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Answers (1)
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The number of people who attended a show increased by 20% everyday. If the number of those who attended on Thursday was 800, how many...
(Solved)
The number of people who attended a show increased by 20% everyday. If the number of those who attended on Thursday was 800, how many people the show on Saturday?
Date posted:
October 16, 2019
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Answers (1)
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A family used 10% of the water in a tank each day. If there was 200 litres of water in the tank. How much water...
(Solved)
A family used 10% of the water in a tank each day. If there was 200 litres of water in the tank. How much water was left after two day's use?
Date posted:
October 16, 2019
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Answers (1)
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After spending 30% of her salary. Mary remained with sh 3500. How much was her salary?
(Solved)
After spending 30% of her salary. Mary remained with sh 3500. How much was her salary?
Date posted:
October 16, 2019
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Answers (1)
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There were 600 students in a school in the year 2002. This was a 20% increase from the year 2001. How many students were there...
(Solved)
There were 600 students in a school in the year 2002. This was a 20% increase from the year 2001. How many students were there in 2001
Date posted:
October 16, 2019
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Answers (1)
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A factory packed 10,000 packets of tea on the first day and 12,000 packets on the second day. What was the percentage increase in the...
(Solved)
A factory packed 10,000 packets of tea on the first day and 12,000 packets on the second day. What was the percentage increase in the number of packets
Date posted:
October 16, 2019
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Answers (1)
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In a constituency, there are 40,000 registered voters. On a polling day, 3/4 of the voters cast their votes. The winner got 4/5 of all...
(Solved)
In a constituency, there are 40,000 registered voters. On a polling day, 3/4 of the voters cast their votes. The winner got 4/5 of all the cast votes. The second candidate got 3/5 of the remaining votes cast while the third candidate got the rest. How many votes did the third candidate get?
Date posted:
October 16, 2019
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Answers (1)
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Miriam had 24 sweets. He ate half of what remained everyday. How many sweet did he remain with after the third day?
(Solved)
Miriam had 24 sweets. He ate half of what remained everyday. How many sweet did he remain with after the third day?
Date posted:
October 16, 2019
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Answers (1)
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Sugar was delivered to a supermarket packed in 500 g packets, 1 kg packets and 2 kg packets. A total of 4.8 tonnes was delivered....
(Solved)
Sugar was delivered to a supermarket packed in 500 g packets, 1 kg packets and 2 kg packets. A total of 4.8 tonnes was delivered. If a third of this was in 500 g packets, 2/5 in 1 kg packets and the rest in 2 kg. How many packets were delivered altogether?
Date posted:
October 16, 2019
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Answers (1)
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Mary can sweep a room in 5 minutes. Lilian can sweep the same room in 6 minutes. If they work together, what fraction of the...
(Solved)
Mary can sweep a room in 5 minutes. Lilian can sweep the same room in 6 minutes. If they work together, what fraction of the room will they sweep in a minute
Date posted:
October 16, 2019
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Answers (1)
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Three eighths of the fruit in a basket are oranges. 2/5 of the remainder are mangoes while the rest are apples. If they are 24...
(Solved)
Three eighths of the fruit in a basket are oranges. 2/5 of the remainder are mangoes while the rest are apples. If they are 24 apples in the basket, how many fruits are there altogether
Date posted:
October 16, 2019
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Answers (1)
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A father left 1/4 of his property to his wife, 2/3 of the remainder to his daughter and the rest to his son. What fraction...
(Solved)
A father left 1/4 of his property to his wife, 2/3 of the remainder to his daughter and the rest to his son. What fraction of his property did the son get?
Date posted:
October 16, 2019
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Answers (1)
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Tap A can fill a tank in 4 minutes while tap B can fill the same tank in 3 minutes. If both taps are opened...
(Solved)
Tap A can fill a tank in 4 minutes while tap B can fill the same tank in 3 minutes. If both taps are opened at the same time, how long will it take to fill the tank
Date posted:
October 16, 2019
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Answers (1)
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In a certain village there 10000 people. Of these 2/5 were women, 3/5 of the remainder were children while the rest were men. How many...
(Solved)
In a certain village there 10000 people. Of these 2/5 were women, 3/5 of the remainder were children while the rest were men. How many men are in the village
Date posted:
October 16, 2019
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Answers (1)
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In a school 3/5 of the students are boys. One day, 1/5 of the girls were absent when 80 girls were present. How many pupils...
(Solved)
In a school 3/5 of the students are boys. One day, 1/5 of the girls were absent when 80 girls were present. How many pupils are in the school
Date posted:
October 16, 2019
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Answers (1)
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Arrange the fractions 4/9, 3/7, 2/5 and 1/2 on ascending order
(Solved)
Arrange the fractions 4/9, 3/7, 2/5 and 1/2 on ascending order
Date posted:
October 16, 2019
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Answers (1)
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One day, 1/4 of the female workers in a factory was absent. A total of 20 workers were absent that day. If 36 female workers,...
(Solved)
One day, 1/4 of the female workers in a factory was absent. A total of 20 workers were absent that day. If 36 female workers, how many male workers were absent that day?
A 8
B 12
C 48
D 27
Date posted:
October 15, 2019
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Answers (1)
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A mason planned the foundation of a hut whose radius was 7 m. If he placed a peg at a 4 m intervals, how many...
(Solved)
A mason planned the foundation of a hut whose radius was 7 m. If he placed a peg at a 4 m intervals, how many pegs were used?
A 44
B 11
C 10
D 12
Date posted:
October 15, 2019
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Answers (1)
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A train left Mombasa at 1850h. It took five hours and ten minutes to reach Nairobi. At what time did it reach Nairobi
A 12...
(Solved)
A train left Mombasa at 1850h. It took five hours and ten minutes to reach Nairobi. At what time did it reach Nairobi
A 12 noon
B 12 midnight
C 6.00 am
D 7.00 am
Date posted:
October 15, 2019
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Answers (1)