Question

The diameter of a cylindrical roller is 9.1 cm and is 2.8 metre long find the area it will convert 30 revolutions

Answer 1

Answer:

R=9.1/2=4.55m

The surface area of roller=

Step-by-step explanation:

$2\pi \: r( \: h + r)$

2×22/7×4.55(2.8+4.55)

210.21m^2

Area it will cover in 30 revolution=210.21×30

=6306.3m^2

Answer 2

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