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Arithmetic Aptitude :: Problems on Ages

1. 7 years ago, the ages (in years) of A and B were in the ratio 4:5 and 7 years hence they will be in the ratio 5:6. The present age of B is:

Answer: Option D

Explanation :

7 years ago, A's age=4x years
and B's age=5xyears

so (4x+14)/(5x+l4)=5/6

=> 25x + 70 = 24x + 84
x = (84 - 70) = 14
B's present age = 5x + 7 = 5*14 + 7 = 77 years

Asked In :: Global Edge

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