Question

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​

Answer 1

Answer:

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