Question

5. The diameter of a garden roller is 1.4 m and it
is 2 m long. How much area will it cover in 50
revolutions?
​

Answer 1

Step-by-step explanation:

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

Answer 2

Step-by-step explanation:

Answer. ∴ Curved surface area of garden roller = 2πrh . So, the area levelled of a garden roller in one revolution is 8.8 m2.