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

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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?


108 cu. m.


110 cu. m.


106 cu. m.


112 cu. m.

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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