Question

The diameter of a garden roller is 14m and it is 2m long. How much area will it cover in 10 revolutions?

Answer 1

Heya,

Given:-

Height = 2m
Diameter = 14m
Radius = 14/2 = 7m
Revolution = 10

To find:-
Area covered by the roller.

Solution:-

Distance covered by the roller = 2πrh

Distance covered by the roller = 2 × 22/7 × 7 × 2

Distance covered by the roller = 2 × 22 × 2

Distance covered by the roller = 44 × 2

Distance covered by the roller = 88m^2

Area covered by the roller = 10 × 88

Area covered by the roller = 880m^2

Hope my answer helps you :)

Regards,
Shobana

Answer 2

Given that,
Diameter of roller =14m
Radius =7m
Length of the roller =2m
Curved Surface Area of cylinder =2×22/7×r×h
= 2×22/7×7×2
= 2×22×2
= 88 msq
In 10 revolutions = 88×10=880
Therefore, it takes 880 msq area in 10 revolutions.

I hope this may help you.