4. Measure the diameters of one rupee coin and five rupee coin and find their circumferences
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Answer:
A 5 rupee coin is cylindrical in shape having radius r and haight h.
TSA of a cylinder is given by 2πr(r+h)
Thus, the total surface area of the cylinder can be calculated by using the formula 2πr(h+r)
Hence, option D is correct.
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