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Question

# A log of wood is cylindrical in shape.The radius and height of the log is 1 cm and 6 cm respectively. What area needs to be covered if the log has to be painted completely ?

A

48 cm2

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B

44 cm2

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C

52 cm2

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D

54 cm2

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Solution

## The correct option is B 44 cm2 Given: r = 1 cm ; h = 6 cm Total Area that needs to be painted = Total Surface Area Total Surface Area = Curved Surface Area + 2× Base Area =2πrh+2πr2 =2πr(h+r) =2×227×1(6+1) =447×1×7 =44 cm2 Hence the total area that needs to be painted =44 cm2

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