SOLUTION: Raghvan has spent a quarter of his life as a boy.One fifth as a youth,one-third as a man and 13 in old age.what is his present age?

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Question 297071: Raghvan has spent a quarter of his life as a boy.One fifth as a youth,one-third as a man and 13 in old age.what is his present age?
Answer by mananth(16946) About Me  (Show Source):
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Raghvan has spent a quarter of his life as a boy.One fifth as a youth,one-third as a man and 13 in old age.what is his present age?
let his present age be x
1/4 as boy
1/5 as youth
1/3 as man
13 in old age
1/4 *x + 1/3 * x+ 1/5* x +13 =x
1/4 *x + 1/3 * x+ 1/5* x -x = -13
take LCM
15x+20x+12x-60x / 60 = -13
15x+20x+12x-60x=-13* 60
-13x=-780
x=60
Raghavan's age is 60 years
Ananth