The diameter of a road roller,130cm long is 91 cm. If it takes 450 complete revolution to level a playground. Find the cost of levelling the playground at 80 Paise per square meter.
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Answer:
Rs.1338.50
Step-by-step explanation:
Solution :-
We have
Radius of the roller (r) =
r = 45.5 cm
Length of the roller (h) = 130 cm
Area covered by ruler in 1 revolution = Curved Surface area of road roller
=》
=》
=》
=》 37180
Area covered in 450 revolutions
=》 37180×450
=》 16731000
=》
=》 1673.1
Cost of levelling the playground = 1673.1× 80p
=》
=》Rs. 1338.48
= Rs.1338.50
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