A 21-m-deep well with diameter 6 m is dug and the earth from digging is evenly spead to form a platform `27 m xx 11` m. Find the height of the platfrom.

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.

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.

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.

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.

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

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

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