Question

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

• A. 49 m²
• B. 50 m²
• C. 25 m²
• D. 55 m²
• E. 56 m²

Answer 1

The correct option is A

49 m²

Area of the wet surface = [2(lb + bh + lh) - lb] = 2 (24 + 5 + 7.5) - 24 = 49 m${}^2$