Question

please answer this question​

Answer 1

the roller is in form of a cylinder

CSA of cylinder = 2pirh

= 2 × 22/7 × 42 × 120

= 31680 cm^2

Since, it takes 500 complete revolutions to move once

Area of playground = 31680 × 500 cm^2

= 15,840,000 cm^2

Now, if we have to convert it in m^2

1 m^2 = 100 × 100 = 10000 cm^2

15,840,000 cm^2 into m^2

= 15840000/10000

= 1584 sq m