A water tank of dimensions 2m * 3m * 1.5m is to be painted leaving its base. Find the total cost of painting the tank if rate of painting = ₹20/m^2.

(a) ₹540

(b) ₹500

(c) ₹420

(d) ₹400

This question was addressed to me during a job interview.

My doubt is from Surface Area of a Cuboid and a Cube in chapter Surface Areas and Volumes of Mathematics – Class 9

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