Read the question below and answer Q.22,Q.23 and Q.24.
There are four water sprinklers kept at the four corners of a square garden. Each sprinklers
sprays water to a maximum distance of half the length of the garden in a right angle with
the middle portion of garden left dry.
22. The total area of garden is
A. Area of square with side 70 m
B. Area of square with side 140 m
C. Area of square subtracted by the area of the arcs
D. Area of square added to the area of the arcs
23. The area that can be covered by the sprinkler is
A. 4900 m2 C. 30800 m2
B. 19600 m2 D. 15400 m2
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Answer:
22 - opt.A area of square with side 140 cm
23. opt . D 15400m2
Step-by-step explanation:
22. each side length of the square garden = (70+70 )cm = 140 cm
23. area covered by each of the four sprinklers is equal to a quarter of area of a circle of radius of 70cm.
so total area covered by sprinklers
= 4 × πr²/4
= πr² ( 4 in the numerator and denominator gets cancelled out)
= 22× 70×70/7
= 22×10×70
=15400 m²( ans)
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