Question

The diameter of a roller is 2.5 m and length is 1.4 m. It moves 100 times to level the playground. What is the area of playground.​

Answer 1

Answer:

Correct option is A)

Area covered = Curved surface × Number of revolutions

r=

2

1.4

=0.7 m

h=2 m

Curved surface = 2πrh=2×

7

22

×0.7×2=8.8 m

2

Hence,

Area covered = 8.8×5=44 m

2