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Question

The cost of painting the walls of a room at the rate of Rs.1.35 per square metre is Rs.340.20 and the cost of matting the floor at the rate of Rs.0.85 per cm2 is Rs.91.80. If the length of the room is 12m, then what is the height of the room?

A
9m
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B
11m
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C
12m
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D
6m
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