A park is in the shape of the circle and a person walking on the boundary covers a distance of 440m in one round. Find the diameter of the park and also the cost of covering it with at the rate of Rs 225 per meter square
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Step-by-step explanation:
premature of circular park=440
Rupees of 1m²=225rs
premature of park =surface area of park
440=4πr²
440=4×22/7×r²
440×7/4×22=r²
220×7/4=r²
55×7=r²
385=r²
√385=r
r=19.6
d=2r
=2×19.6
=39.2
Area of circular park=1/4πr³
=1/4×22/7×19.6×19.6×19.6
=22×4.9×2.8×19.6
=5916.064m²
Rupees of circular park=225×5916.064
=1331114.4rs
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