1.

The ages of Samir and Tanuj are in the ratio of ` 8 : 15` years respectively. After 9 years the ratio of their ages will be `11 : 18`. What is the difference in years between their ages ?A. 24 yearsB. 20 yearsC. 33 yearsD. 21 years

Answer» Correct Answer - D
Let present ages of Samir and Tanuj are 8x and 15x years respectively.
Difference between their ages = ` 15x - 8x = 7x`
Ratio of ages after 9 years ,
` (8x+9)/(15x+9) = 11/18`
` rArr 144x+162 = 165x + 99`
` rArr 21x = 63 rArr x = 3`
Difference between their ages = 7x = 21 years


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