Question

a roller of diameter 14cm and length 7 cm is rolled along a flat ground calculate the area covered when the roller makes 25 revolution

Answer 1

Step-by-step explanation:

ANSWER

Given, Diameter of roller is 14 cm and length 7 cm.

Radius= (Diameter/2)=7cm

To find area it rolled in 1 revolution we have to find curved surface area.

Curved surface area =2πrh

=2×3.14×7 ×7

= 307.72 cm2

Area covered in 25 revolutions= 25 × 307.72 = 7693 cm2

Answer 2

Answer:

Step-by-step explanation: