the length of a rectangular blackboard is three times it's width is 1.5 m find it's area also find the cost of painting the bladband at the rates
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Step-by-step explanation:
Let the length of rectangle = L
L = 3 x width = 3 x 1.5 m = 4.5 m
Area of rectangle = L x width or breadth = 4.5 m x 1.5 m = 6.75 m ²
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