A man has built a cubical water tank in his house. All sides of it are equal to 1.8m. All sides except the base are to be covered by tiles having equal sides of 30cm. How much money will he spend on tiles if cost of tiles is ₹400/dozen?

(a) ₹7000

(b) ₹7200

(c) ₹6000

(d) ₹6500

This question was addressed to me during an interview for a job.

I want to ask this question from Surface Area of a Cuboid and a Cube in section Surface Areas and Volumes of Mathematics – Class 9

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