Question

the diameter of a roller 2m long is 91cm.if it takes 100 revolution to level the ground find the cost of levelling the ground at the rate of rs2/metre square​

Answer 1

Step-by-step explanation:

Diameter of the roller = 84 cm = 0.84 m

Length of the roller = 1.5 m

Radius of the roller = D/2 = 0.84/2 = 0.42

Area covered by the roller on one revolution = covered surface area of roller

Curved surface of roller = 2πrh = 2 x 22/7 x 0.42 x 1.5

= 0.12 x 22 x 1.5 m2

Area of the playground = 100 x Area covered by roller in one revolution

= (100 x 0.12 x 22 x 1.5) m2

= 396 m2

PLEASE CHANGE THE VALUES BY SEEING IN YOUR QUESTION.

HOPE IT HELPS

Answer 2

Answer:

Thats how to solve it

Thank you

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