The ratio of two numbers is 7:4, if 8 is added to both the number ration becomes 13:8 what is the smaller number?

A 40
B 56
C 38
D 52

Correct Answer: 40

Let's 7x and 4x be two number.Now, 7x + 8:4x + 8 = 13:8Or, 52x + 104 = 56x + 64Or, 56x - 52x = 104 - 64Or, 4x = 40Or, x = 10So small number is 4x = 4×10 = 40Or, x
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