The total cost of flooring a room at Tk. 8.50 per square metre is TK. 510. If the length the room is 8 m , its breadth is -

The total cost of flooring a room at Tk. 8.50 per square metre is TK. 510. If the length the room is 8 m , its breadth is - Correct Answer 7.5 m

Area = (510/8.50)           = (510/85)×10           = 60m² ∴Breadth = 60/8                 = 7.5 m 
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