What is the cost, in taka, of a carpet x yards long and y yards wide, if the cost of carpet is Tk. 5 per square ft.?

What is the cost, in taka, of a carpet x yards long and y yards wide, if the cost of carpet is Tk. 5 per square ft.? Correct Answer 45xy

Length of carpet = x yards = 3x feet  [1 yard = 3 feet] Width of carpet = y yards = 3y feet Area of carpet = 3x  x  3y = 9xy  sq ft Total cost = 5 x 9xy =  45xy TK.
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