Previous are = Length x Width = L X W = LW
New Area = $(\frac{110}{100}L) \times (\frac{120}{100}W) \ = \ 1.32LW$
Change in Area= 1.32LW -LW = 0.32LW
Percentage Change in Area =$ \frac {0.32LW}{LW} \times 100$
= 32%
raphael answered the question on January 17, 2017 at 05:32
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The following data shows sizes of shoes worn by eleven form two students.
(Solved)
The following data shows sizes of shoes worn by eleven form two students.
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Date posted:
January 17, 2017
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Answers (1)
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Given that log 7 = 0.84510, log 5 = 0.69897 and log 2 = 0.30102, find
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Given that log 7 = 0.84510 and log 5 = 0.69897, find the logarithm of 980 without using tables or calculator
Date posted:
January 16, 2017
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Answers (1)
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(Solved)
Calculate the equation of a mirror line that reflects A(2, 7) onto A' (6, -1)
Date posted:
January 16, 2017
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Answers (1)
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Make x the subject of in the following expression
(Solved)
$\frac{x^4 - 4}{x^2 -2} \ = K$
Date posted:
January 16, 2017
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Answers (1)
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The difference between two digits is 8. Find the value of the two digits if their product is to be maximum
(Solved)
The difference between two digits is 8. Find the value of the two digits if their product is to be maximum
Date posted:
January 16, 2017
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Answers (1)
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Find the percentage change from question given below
(Solved)
If $ 2^{x + 5} = (\frac{1}{16})^{-1}$ and 42x - y =$\frac{1}{4}$ increase 105 in the ratio $y - x:\frac{1}{3}y$ and find the percentage change.
Date posted:
January 16, 2017
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Answers (1)
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20 soldiers left for war and carried food that would last 7 days
(Solved)
20 soldiers left for war and took with them food that would last 7 days. After 4 days, 4 of the soldiers were recalled back to the headquarters. For how long did the remaining food last if the rate of consumption remained unchanged?
Date posted:
January 16, 2017
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Answers (1)
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Determine the change in the family's monthly expenditure on vegetables from the information given below
(Solved)
John's family spends Ksh. 2,700 per month on vegetables. Last month, the price of vegetables went up in the ratio $1\frac{1}{4}$:1. If the family decided to reduce the amount of vegetables consumed in the ratio $\frac{14}{15}$, determine the change in the family's monthly expenditure on vegetables.
Date posted:
January 16, 2017
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Answers (1)
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The perimeter of a rectangle is $4(2 + \sqrt{3}) \ cm$. One of its sides is $1 + \sqrt{3}$ cm long. Find the area of the rectangle.
(Solved)
Find the area of the rectangle if the perimeter of a rectangle is $4(2 + \sqrt{3}) \ cm$ and one of its sides is $1 + \sqrt{3}$ cm long.
Date posted:
January 16, 2017
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Answers (1)
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Without using mathematical tables or a calculator, find the exact value of
(Solved)
$\frac{28 \times 5.54 + 72 \times 5.54}{7.77^2 - 2.23^2}$
Date posted:
January 16, 2017
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Answers (1)
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Find the number of sides of the polygon
(Solved)
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Date posted:
January 16, 2017
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Answers (1)
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(Solved)
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Date posted:
January 16, 2017
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Answers (1)
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List the integers that satisfy the two inequalities below
(Solved)
$\frac{x}{2} - 1 \lt \frac{x}{5}, \frac{3}{8} + \frac{x}{3} \ge \frac{x}{4}$
Date posted:
January 16, 2017
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Answers (1)
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Given that sin(2x - 30)o = cos(3x - 50o), find the value of x
(Solved)
Find the value of x from the following:
sin(2x - 30)o = cos(3x - 50o)
Date posted:
January 16, 2017
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Answers (1)
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A vector A passes through the points A(7,9) and B(3,5)
(Solved)
A vector A passes through the points A(7,9) and B(3,5). Vector b passes through the points C(x, -2) and D(-5,0). If a is parallel to b, determine the value of x.
Date posted:
January 16, 2017
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Answers (1)
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Use mathematical tables to evaluate the following
(Solved)
$\frac{2}{(3.432)^{1/3}} + \frac{4}{\sqrt {0.0684}}$
Date posted:
January 16, 2017
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Answers (1)
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The coordinates of the points A and B are (2, 5, 4) and (2, 1, 8) respectively.
(Solved)
The coordinates of the points A and B are (2, 5, 4) and (2, 1, 8) respectively. In what ratio does the point C(2, 4, 5) divide AB?
Date posted:
January 14, 2017
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Answers (1)
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Find to 4 significant figures the percentage error in the area of the rectangle.
(Solved)
The length and width of a rectangle measured to the nearest millimeter are 7.8 cm and 4.7 cm respectively.
Find to 4 significant figures the percentage error in the area of the rectangle.
Date posted:
January 14, 2017
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Answers (1)
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Mutuku and Kamau live 40 km apart. Mutuku starts from his home and cycles towards Kamau's house at 16 km/h.
(Solved)
Mutuku and Kamau live 40 km apart. Mutuku starts from his home and cycles towards Kamau's house at 16 km/h. Kamau starts from his home at 8:00 am and cycles towards Mutuku. At what time do they meet?
Date posted:
January 9, 2017
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Answers (1)
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A water tank 5 m long has a cross-section area of 135 m2
(Solved)
a) Find the capacity of the water tank in litres
b) Water was allowed into the empty tank at 10.00 pm at a constant rate of 25 litres per second. What time will the tank be completely full? Give your answer in 24 hours system.
Date posted:
January 9, 2017
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Answers (1)