A 20 m deep well with diameter 7 m is dug and the earth from digging is evenly spread out to form a platform 22 m by 14 m. Find the height of the platform.

**Solution:**

Diamater of well **m**

Radius of well **m**

Height of well **m**

Length of platform **m**

Breadth of platform **m**

Let height of platform

** According to given condition we have:**

Volume of Well = Volume of Earth Dug out

**m**