The radius of a roller is 14 cm and its length 20 cm. It takes 235 complete revolutions to move once over to level a playground. Find the area of the playground.(Use π=22/7)

4136 × 10² cm²

We know that,

Curved surface area of cylinder = 2πrh

We have,

Radius of roller = 14 cm

Length = 20 cm

Curved surface area of roller = 2 × \(\frac{22}{7}\) × (14) × (20) = 1760 cm².

Now, area of the playground = 235 × 1760 

= 4136 × 10² cm²