The Total cost of flooring a room at Rs.8.50 per square meter is Rs.510. If the length of the room is 8km it’s breadth is__________?

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A. 7.5m
B. 8.5m
C. 10.5m
D. 12.5m

A. 7.5m

Cost of flooring per square meter = Rs.8.50

Total cost of flooring of room = Rs.510

Area of the room = 510/8.50
Area of the room = 60m²

Area of the room = l×b
60 = 8×b
b = 60/8
​
b =7.5m

Breadth of the room is 7.5m

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