Lessons

General Aptitude
8.1 Volume and Surface Area - General Questions

4 / 15

Q.

A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:

View Answer

Correct choice: B

Explanation:

Let the thickness of the bottom be x cm.

Then, [(330 - 10) x (260 - 10) x (110 - x)] = 8000 x 1000

⇒ 320 x 250 x (110 - x) = 8000 x 1000

⇒ (110 - x) = (8000 x 1000)/ = 100
(320 x 250)

⇒ x = 10 cm = 1 dm.

4 / 15