Area = ½ ab sine C where c is the included angle of the sides a and b.
A = ½ x 5 x 9 sin 30°
=11.25 cm^2
joseph rimiru answered the question on September 29, 2017 at 16:41
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On a map with a scale of 1:500 000, a coffee plantation covers an area of 20 cm^2 . Find the actual area of the...
(Solved)
On a map with a scale of 1:500 000, a coffee plantation covers an area of 20 cm^2 . Find the actual area of the plantation I hectares.
Date posted:
September 29, 2017
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Answers (1)
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The area of a sector of a circle radius 35 cm is 490 cm^2. Calculate the angle subtended at the centre of the circle. (Take...
(Solved)
The area of a sector of a circle radius 35 cm is 490 cm^2. Calculate the angle subtended at the centre of the circle. (Take π =22/7 ).
Date posted:
September 29, 2017
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Answers (1)
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Using the Hero’s formula find the area of a triangle whose sides are 8 cm, 6cm, and 10 cm
(Solved)
Using the Hero’s formula find the area of a triangle whose sides are 8 cm, 6cm, and 10 cm
Date posted:
September 29, 2017
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Answers (1)
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Calculate the surface area of a solid cone of base radius 14 cm and the height 26 cm.
(Solved)
Calculate the surface area of a solid cone of base radius 14 cm and the height 26 cm.
Date posted:
September 29, 2017
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Answers (1)
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A house to be built measure on a plan as 40cm by 20 cm. If the linear scale factor is 25, find the
...
(Solved)
A house to be built measure on a plan as 40 cm by 20 cm. If the linear scale factor is 25, find the
actual area of the house.
Date posted:
September 29, 2017
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Answers (1)
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Use binomial expansion to evaluate (1.02)^6 to 4 s. f
(Solved)
Use binomial expansion to evaluate (1.02)^6 to 4 s. f
Date posted:
September 28, 2017
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Answers (1)
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Factorize 2a(x - y) + 3b( y - x) .
(Solved)
Factorize 2a(x - y) + 3b( y - x) .
Date posted:
September 27, 2017
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Answers (1)
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s = ut +1/2 at^2 . Find a when s = 6000, u= 10 and t = 20.
(Solved)
s = ut +1/2 at^2 . Find a when s = 6000, u= 10 and t = 20.
Date posted:
September 27, 2017
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Answers (1)
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Evaluate 0.219 x´ 0.257 to 3 significant figures.
(Solved)
Evaluate 0.219 x´ 0.257 to 3 significant figure.
Date posted:
September 27, 2017
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Answers (1)
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If a : b = 3 : 4 and a : c = 2 : 5, find a : b : c. ...
(Solved)
If a : b = 3 : 4 and a : c = 2 : 5, find a : b : c.
Date posted:
September 26, 2017
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Answers (1)
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Find Cos x if Cos 2x = 0.9.
(Solved)
Find Cos x if Cos 2x = 0.9.
Date posted:
September 26, 2017
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Answers (1)
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A car travels 100 km in (¾) hour. How far will it travel in 20 min?
(Solved)
A car travels 100 km in (¾) hour. How far will it travel in 20 min?
Date posted:
September 26, 2017
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Answers (1)
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Using the mathematical tables, find the tangent, sine and cosine of the following angles.
a. 52° b....
(Solved)
Using the mathematical tables, find the tangent, sine and cosine of the following angles.
a. 52⁰ b. 53.50⁰ c. 30⁰ 20’
Date posted:
September 26, 2017
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Answers (1)
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Akinyi bought and beans from a wholesaler. She then mixed the maize and beans the ratio 4:3
she brought the maize as Kshs. 12 per kg...
(Solved)
Akinyi bought and beans from a wholesaler. She then mixed the maize and beans the ratio 4:3
she brought the maize as Kshs. 12 per kg and the beans 4 per kg. If she was to make a profit of
30% what should be the selling price of 1 kg of the mixture
Date posted:
September 25, 2017
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Answers (1)
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Two baskets A and B each contains a mixture of oranges and lemons. Basket A contains 26
oranges and 13 lemons. Basket B contains 18 oranges...
(Solved)
Two baskets A and B each contains a mixture of oranges and lemons. Basket A contains 26
oranges and 13 lemons. Basket B contains 18 oranges and 15 lemons.Determine the probability that the fruit picked radomnly is an orange.
Date posted:
September 25, 2017
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Answers (1)
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A number of two digits is such that four times the sum of its digits exceed the number by three. The number is increased by...
(Solved)
A number of two digits is such that four times the sum of its digits exceed the number by three. The number is increased by thirty six when the digits are reversed. Find the number.
Date posted:
September 23, 2017
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Answers (1)
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The volume Vcm^3 of an object is given by
V = 2/3 p r {(1-2)/sc^2}
Express in term of p r, s and V
(Solved)
The volume Vcm^3 of an object is given by
V = 2/3 π r {(1-2)/sc^2}
Express in term of π r, s and V
Date posted:
September 23, 2017
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Answers (1)
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A perpendicular to the line -4x + 3 = 0 passes through the point ( 8, 5) Determine its equation.
(Solved)
A perpendicular to the line -4x + 3 = 0 passes through the point ( 8, 5) Determine its equation.
Date posted:
September 23, 2017
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Answers (1)
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Simplify
{(2x – 2)/(6x^2 – x – 12)}/{(x-1)/(2x-3)}
(Solved)
Simplify
{(2x – 2)/(6x^2 – x – 12)}/{(x-1)/(2x-3)}
Date posted:
September 23, 2017
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Answers (1)
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The radius of a circle is 14cm. Find the length of arc and the area of the sector given that...
(Solved)
The radius of a circle is 14cm. Find the length of arc and the area of the sector given that the angle
subtended at the centre is 60 degrees.
Date posted:
September 23, 2017
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Answers (1)