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

Given,

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 spread over rest of the ground.

To find :

By how much height of ground will rise up

.

Solution :

Length of ground = 100 m

Width of ground = 80 m

Again, length of well = 40 m

Width of well = 20 m

Depth of well = 18 m

∴ Volume of well = 40 * 20 * 18

∴ Volume of well = 14400 m³

∵ Volume of earth dugout = Volume of well

∴ Volume of earth dugout = 14400 m³

Now let the rise of height of ground be 'h' m

∴ Volume of ground = Volume of earth dugout

⇒ 100 * 80 * h = 14400

⇒ 8000h = 14400

⇒ h = 14400/8000

⇒ h = 1.8 m

∴ Height of ground will rise by 1.8 m.

Answer 2

Answer:

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