Question

A ground is 100 m long and 80 m wide. A well 40 m long, 20 m wide
and 18 m deep is dug and the amount of the soil taken out are spreaded
over rest of the ground. By how much height of ground will rise up
?​

Answer 1

Answer:

Here the concept of Volume of Cylinder and Volume of Cuboid has been used. We see that the ground is in the shape of cuboid. Also the well is in the shape of Cuboid. We know that whatever quantity of soil will be taken out will be equal to volume of well, since well is to be emptied full. Then that soil is to be spread all over the field equally. So the volume of ground after spreading soil will be equal to the volume of soil taken out that is volume of well. Without height the ground will remain as a rectangular plane but when its raised to some height by spreading soil, we can find out its volume.

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★ Formula Used :-