Question

The diameter of a roller is 84 cm and it's length is 120 cm it's take 500 complete revolution to more once oner to level a playground find the area of playground in meter .

Answer 1

Given,

Diameter = d = 84cm

Radius = r = d/2 = 42cm

Length = l = 120 cm

T.S.A of cylinder = 2πrh

                           = 2 x 22/7 x 42 x 120

                           = 31680 cm²

Area levelled by 500 revolution = Area of playground

= 500 x 31680cm²

= 15840000 cm² [ change into m]

= 1584 m²

Answer 2

here is ur answer mate...........