Question

The diameter of a roller is 84cm and its length is 120cm. It takes 500
complete revolutions to move once cover to level a playground. Find
the area of the playground is m^2​

Answer 1

Step-by-step explanation:

Diameter of roller = 84 cm = 0.84 m

radius of roller = 0.42 m

length = height = 120 cm = 1.2 m

CSA of roller = 2πrh = 2 × 22/7 × 0.42 × 1.2

= 3.168 m²

It takes 500 revolutions to cover the playground.

So multiplying by 500 will give the area of playground.

Area of playground = (3.168 × 500) m²

Area of playground = (3.168 × 500) m²= 1584 m²

Keep Studying, All The Best!

Answer 2

hope it's help u dear..!!!