# maths

a 40m deep well with radius 3.5m is dug and the earth taken out is evenly spred to form aplat form of dimenshins 28m by 22m find the heght of theplat form?

1. 👍 0
2. 👎 0
3. 👁 75
1. 56

1. 👍 0
2. 👎 0
2. thickness = volume/area
so,
thickness = (π*3.5^2*40)/(28*22) = 2.5m

1. 👍 0
2. 👎 0
3. Vw = pi*r^2*d = 3.14 * 3.5^2 * 40 = 1539 m^3. = Vol. of well.

Vp = L*W*h = 1539.
28 * 22 * h = 1539,
h = 2.5 m.

1. 👍 0
2. 👎 0
posted by henry2,

## Similar Questions

A 40m deep well with radius 3.5m is dug & the earth taken out is evenly spead to from a platform of dimension 28m by 22m.find the heght of the platfoem?

asked by fira on May 22, 2016
2. ### Maths

A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform.

asked by Anonymous on April 7, 2013
3. ### Maths

A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform.

asked by Anonymous on April 7, 2013
4. ### Maths

A 40m Deep Well With Radius 3.5m Is Dug And The Earth Taken Out Is Evenly Spread To Form A Platform Of Dimensions 28m By 22m.Find The Heiht Of The Platform.

asked by Shewit on April 23, 2019
5. ### Maths

A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform.

asked by Anonymous on April 7, 2013
6. ### Maths

A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform.

asked by Anonymous on April 7, 2013
7. ### math

A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a plat form of dimension 28m by 22m. Find the height of the platform.

asked by Abenezer on May 8, 2014
8. ### math

The well is dug 14m deep. Its radius is 2m. The earth dug out is evenly spread out on a rectangular field of dimensions 10m*4m. Find the height of the platform raised.