Question

11. A well is dug 20 m deep and it has a diameter 7 m. The earth which is so dug out is
spread evenly on a rectangular plot 22 m long and 14 m broad. What is the height
of platform formed?

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Answer 1

Answer:

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Answer 2

Answer:

Height of the platform = 2.5 m

Step-by-step explanation:

Solution:-

Diameter = 7 m  so, radius = 3.5 m

H = 20 m

Volume of the earth dug out = π r² h

= 22/7 × 3.5 × 3.5 × 20

= 770 m³

Area of the platform = Length × breadth

⇒ 22 × 14 = 308 m²

Height of the platform = Volume of the earth dug out/area of the platform

⇒ 770/308

Height of the platform = 2.5 m

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