Question

The radius of the roller is 0.7 m and it is 2 m long . How much Area will it cover in 10 revolutions

Answer 1

$r = 0.7m = 70cm \: \\ h = 2m = 200cm \\ \\ csa = 2\pi rh \\ = 2 \times \frac{22}{7} \times 70 \times 200 \\ = 2 \times 22 \times 10 \times 200 \\ = 88000 {cm}^{2} = 8.8 {m}^{2} \\ at \: 10revolutions = 8.8 \times 10 = 88 {m}^{2}$

Answer 2

88 sq.m. is covered in 10 revolutions

Step-by-step explanation:

Radius of roller = 0.7 m

Length of roller = 2 m

Curved surface area of roller = $2 \pi r h$

                                                = $2 \times \frac{22}{7} \times 0.7 \times 2$

                                                =8.8 sq.m.

Area covered in 1 revolution = 8.8 sq.m.

Area covered in 10 revolutions =$8.8 \times 10 = 88 sq.m.$

Hence 88 sq.m. is covered in 10 revolutions

#Learn more:

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

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