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Question

# A tank with length, breadth and height of 5, 6 and 3 units respectively is open at the top. Find the cost of anti-microbial coating inside the tank if it is done at Rs. 10 per sq. units.

A

Rs. 1260

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B

Rs. 1110

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C

Rs. 1060

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D

Rs. 960

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Solution

## The correct option is D Rs. 960 So, there are five faces which need to be coated. Surface area of tank = 2(lb + bh + lh) – lb = 2 (5 × 6 + 6 × 3 + 3 × 5) – 30 sq. units = 96 sq. units So, cost of anti – microbial coating = Rs.10 × 96 sq. units = Rs. 960

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