Discussion of Question with ID = 040 under Volume-and-Surface-Areas

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Question

An iron tank 5 m × 2 m is filled with water upto a height of 7 m. What surface area of the tank is at a higher risk of corrosion?

A

108 cu. m.

B

110 cu. m.

C

106 cu. m.

D

112 cu. m.

Soln.
Ans: a

If L, B and H are the dimensions of the water column, then the wet area is 2(BH + LH) + LB = 2 × (2 × 7 + 5 × 7) + 5 × 2. The result is 108 cu. m.


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