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Question

A house with a flat roof is rectangular in shape, 10 m wide, 13 m long and 5 m high. It is to be painted inside and outside, and on the ceiling, but not on the roof or floor. The total number of sq. m. to be painted is:


A
360
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B
460
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C
650
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D
590
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E
720
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Solution

The correct option is D 590
$$S = 1 (13 \cdot 10) + 2[4(13 \cdot 5)] = 590$$.

Mathematics

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