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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:
A.
49
B.
50
C.
53.5
D.
55
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 = 49m2
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