Question

the radius of a roller is 0.7 M and it is 2m long how much area will it cover in 12 revolutions​

Answer 1

area covered in 1 revolution=2pierh

2×22/7×0.7×2=44/5=8.8m^2

now in 12 revolution area covered =8.8×12=92.4m^2

Answer 2

Here is your answer.

Hope it's help you