Question

The diameter of a roller is 70 cm and its length is 1.5 m. It takes 1000 complete revolutions moving once over to level a stadium. Determine the area of the stadium
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Answer 1

Answer:

Given:-

• Diameter of roller is 70cm
• length of roller is 1.5cm
• Number of revolution is 1000

To Find:-

• Area of stadium

Formula used:-

• Curved surface area of cylinder

ATQ

Length of roller = 1.5m = 150cm

Diameter = 70cm

Radius = 35cm

C.S.A of cylinder = 2πrh

C.S.A = 2×22/7×35×150

C.S.A = 2×22×5×150

C.S.A = 33000cm²

Area of stadium = C.S.A of roller × No. of revolution

a = 33000×1000

a = 33000000cm²

The area of stadium is 33000000cm².

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