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ATQ, Let present ages of mother and son be ‘21x’ years and ‘10x’ years respectively. So, present age of father = (21x + 17) years So, 21x + 10x + 21x + 17 = 39 × 3 = 117 Or, 52x = 100 Or, x = 2 Present age of mother = 21 × 2 = 42 years Present age of father = 42 + 17 = 59 years Desired ratio = 42:59 = 6:7
A man sells two articles at 29.180 each. He gains 8% on one article and loses 15% on the other. His overall profit or loss is:
If by selling an article for Rs. 912 a shopkeeper gains 14%, find its cost.