Question

The distance of a roller is 2.5 metres and its length is 1.4 M how much area will it cover in 7 revolution

Answer 1

GIVEN :

• Distance of a roller = 2.5 meters
• Length of a roller = 1.4 meters

TO FIND :

• How much area will be covered in 7 revolution = ?

STEP - BY - STEP EXPLANATION :

=> Radius of a roller = 2.5/2 m

=> Length of a roller = 1.4m (GIVEN)

=> Curved surface area of roller = 2πrh

$= > 2 \times \frac{22}{7} \times \frac{2.5}{2} \times 1.4 = 11 {m}^{2}$

=> Area covered in one revolution = covered surface area of a roller.

=> Area covered in 7 revolutions = 7 × curved surface area

=> 7 × 11 = 77m²

Hence, area covered in 7 revolution = 77m²