Question

# A tank with length, breadth and height of 5, 6 and 3 units respectively is open from the top. The cost of anti-microbial coating inside the tank at ₹ 10 per sq. unit is ______.

A

₹ 1260

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B

₹ 960

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C

₹ 660

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D

₹ 1060

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Solution

## The correct option is B ₹ 960 Given, Length, l=5 units Breadth, b=6 units Height, h=3 units Area inside the tank =Lateral Surface Area + Floor Area =2h(l+b)+lb =[2×3(5+6)]+[5×6] =[6×11]+30 =96 sq. units Given, cost of anti-microbial coating per sq. unit = ₹ 10 ∴ Total cost of anti-microbial coating =96×₹10 =₹ 960

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