Question

A cylindrical roller 1m long of radius 70 cm takes 500 revolutions to level a playground find area of play ground ?

Answer 1

Answer:2200rev m^2

Explanation:

Surface area of cylinder=2×pie×r×h

=2×(22/7)×0.7×1

=44×0.1=4.4m^2

Area of playground=500re.×4.4

=2200