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A well with 10m inside diameter is du...

A well with 10m inside diameter is dug 8.4m deep. Earth taken out of it is spread all around it to a width of 7.5m to form an embankment. Find the height of the embankment.

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The correct Answer is:
1.6 m
Volume of earth dug out = volume of earth of earth in embankment
`pi xx 5 xx 5 xx 8.4 = pi xx {(12.5)^(2) - 5^(2)} xx h`. Find h
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RS AGGARWAL-VOLUME AND SURFACE AREA OF SOLIDS-Exercise 15B
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  13. How many litres of water flow out of a pipe having an area of cross...

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  15. A cylindrical container with diameter of base 56cm contains sufficie...

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  16. Find the cost of sinking a tube-well 280 m deep, having a diameter 3m ...

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  17. Find the length of 13.2 kg of copper wire of diameter 4 mm, when 1 cub...

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  18. It costs Rs 3300 to paint the inner curved surface of a cylindrical ve...

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  19. The difference between inside and outside surfaces of a cylindrical...

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