Question

31.

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

Answer 1

Height of rectangle block = 10 m

Explanation:

Given:

Height of well = 20 m

Radius of well = 7 m

Dimension of rectangle = 22m x 14m

Find:

Height of rectangle block

Computation:

Volume of well = Volume of rectangle block

πr²h = (l)(b)(h)

(22/7)(7)²(20) = (22)(14)(Height of rectangle block)

(22/7)(49)(20) = (308)(Height of rectangle block)

3080 = 308(Height of rectangle block)

Height of rectangle block = 10 m