By selling an article, Shila earned a profit equal to 1/4 th of the price she bought it for. If she sod it at TK.375, what was the cost price ?

A TK. 300
B TK.281.75
C TK.325
D TK.312.50

Correct Answer: TK. 300

Let the cost price be P. Now, Cost price + Profit = Selling price or,  P + P/4 = 0.375 or,  5P/4 = 0.375 or,  P = 0.375 x 4 / 5 = 0.300 TK 
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