Question

A roller has a diameter of 0.5 m and a length of 1.5 m find the number of revolutions has to make to cover an area of 264 square metre

Answer 1

hello frnd!

here's ur answer...

given diameter=0.5m

therefore radius=0.5/2

=0.25m

height of the roller=1.5m

CSA of the roller=2πrh

=2×3.14×0.25×1.5

=2.355m²

no. of revolutions to cover 264m²=264/2.355

=112.1

hence, it will take 112.1 revolutions to cover 264m²

hope this helps...

Answer 2

112 Revolution required to cover an area of 264 m²

Step-by-step explanation:

A roller has a diameter of 0.5 m

=> Circumference = π * Diameter  =  0.5π m

Circumference = 1 revolution = 0.5π m

Length = 1.5 m

Area Covered in 1 revolution = 0.5π  * 1.5 m²

Total Area to be covered = 264 m²

Number of Revolution required :  264/(0.5π  * 1.5)

using π  = 22/7

=  264* 7 /(0.5 * 22  * 1.5)

= 12 * 7 /(0.5 * 1.5)

= 112

112 Revolution required to cover an area of 264 m²

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