Question

The diameter of a roller is 84 cm and it's length is 120 cm.it takes 500 complete revolutions to move once over to level a playground.find the area of the playground in sq m.

Answer 1

Radius of roller =84/2=42cm
Length =120cm
Area covered in 1 revolution =c.s.a of the roller.
2πrh
=2*22/7*42*120
=31680cm square
Area of playground =area covered in 500 revolutions.
500*31680=15840000cm square
=1584m square

Answer 2

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