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Volume Surface Area Cuboid Cube | Volume Surface Area Cuboid Cube Exercise 21.2

Question 12

A rectangular field is 70 m long and 60 m broad. A well of dimensions 14 m × 8 m × 6 m is dug outside the field and the earth dug-out from this well is spread evenly on the field. How much will the earth level rise?

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Given details are,

Dimensions of rectangular field = 70m × 60m

Dimensions of well = 14m × 8m × 6m

Amount of earth dug out from well (volume) = l × b × h

= 14 × 8 × 6 = 672m3

We know that,

Rise in earth level = dimensions of rectangular field / amount of earth dug up

= (70×60) / 672

= 0.16m

= 16cm

∴ Rise in earth level on a rectangular field is 16cm.

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Question 12

A rectangular field is 70 m long and 60 m broad. A well of dimensions 14 m × 8 m × 6 m is dug outside the field and the earth dug-out from this well is spread evenly on the field. How much will the earth level rise?

Looking to do well in your science exam ? Learn from an expert tutor. Book a free class!

Given details are,

Dimensions of rectangular field = 70m × 60m

Dimensions of well = 14m × 8m × 6m

Amount of earth dug out from well (volume) = l × b × h

= 14 × 8 × 6 = 672m3

We know that,

Rise in earth level = dimensions of rectangular field / amount of earth dug up

= (70×60) / 672

= 0.16m

= 16cm

∴ Rise in earth level on a rectangular field is 16cm.

Our top 5% students will be awarded a special scholarship to Lido.

subject-cta
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