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CAT 2016 Quantitative Ability

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Question : 13

Total: 34

An unsharpened cylindrical pencil consists of a layer of wood surrounding a solid cylinder of graphite. The radius of a pencil is 7 mm, the radius of the graphite cylinder is 1 mm and the length of the pencil is 10 cm. Find the cost of the material used in a pencil, if the cost of wood is Rs‌.0‌.70∕cm3 and that of graphite is Rs‌.2‌.10∕cm3 .

Rs.8.76
Rs.10.02
Rs.11.22
Rs. 13.74

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