Question

The diemeter of a cylindrull
roller is 9.1cm and is 2.8 m long
Find the area it will coveres 30
revolutions ​

Answer 1

Answer:

5460.49 m²

Step-by-step explanation:

Area of cylinder = πr²h

= 3.14 × 9.1/2 × 9.1/2 × 2.8

= 182.016 m²

Area covered in 30 revolutions

= 182.016 × 30

= 5460.49 m²

Answer 2

Area covered in one revolution =C. S. A of cylinder

=>

$2 \times \pi \times r \times h$

2×(22/7)×(9.1/2)×2.8

$80.08 {m}^{2}$

Therefore, area covered in 30 revolutions=30×80.08

=

$2402.4 {m}^{2}$

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