An open circular tank is dug 20 m deep The earth is taken out and has been spread all round it to fo...........

Quantitative Aptitude ( CCS) Mensuration 3D

An open circular tank is dug 20 m deep. The earth is taken out and has been spread all round it, to form a circular embankment. The width of an Embankment is 2 m,& diameter of circular tank is 18m. Find the height of circular embankment.

52.6

45.0

40.5

36.6

छोटे Courses बड़े Results

Master Mensuration 3D

Prepare through Micro-courses

Try Now

Explanation:

Volume of the Open Circular Tank = πr²h = π * [(18)/2]² * 20
= π*9*9*20 m^3.
Also, area of the earth dug out = π(9+2)² - π(9)²
= π[(11+9)(11-9)] = π(20)(2) = 40πm²
∴ Height of circular embankment = (= π*9*9*20 )/( 40π ) = 40.5m