Question

The diameter of a 120cm long roller is 84 can . It takes 1000 complete revolutios moving one over to level a playground v. What vis the area of the playground?

Answer 1

Answer:

Step-by-step explanation:

CSA of cyl = 2πrh

Area covered in 1 rev = 2 x 22 x 42 x 120/7

                                   = 44 x 120 x 6

                                   = 31680cm^2

Dist covered in 1000 revs = 31680 x 1000

                                           = 31680000cm²

                                           = 3168m²

So, area of playground is 3168m²

Hope for brainliest!!!

                                   

Answer 2

Answer:

Step-by-step explanation:the radii of roller

The roller is =84 cm long

Then the curve surface area = 2πrh

=2× 22/7×60×84

=36960

There are=1000rounds

=36960×1000

=36960000cm3