Lessons

General Aptitude
8.1 Volume and Surface Area - General Questions

7 / 15

Q.

A cistern 6m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is:

View Answer

Correct choice: A

Explanation:

Area of the wet surface = [2(lb + bh + lh) - lb]
  = 2(bh + lh) + lb
  = [2 (4 x 1.25 + 6 x 1.25) + 6 x 4] m2
  = 49 m2.
7 / 15