the radius of cylindrical roller is 140cm and its length is 100cm. it takes 500 complete revolution to level a playground completely .find area of playground
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Step-by-step explanation:
Radius of cylindrical roller =140 cm
Length=height =100cm
Surface area of cylindrical roller =2pie rh
2*22/7*140*100= 88000sq.cm
Area of 1 revolution =area of roller= 88000sq.cm
Area of 500 revolution =500×88000=
4400000sq.cm
Are of playground =44000000sq.cm or 440000sq.m
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