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| Total Answers and Comments: 5 |
Last Update: June 18, 2008 Asked by: getasif |
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Submitted by: kiranaar10728
let father's age be 6x and son's age be x.le mother's age be y
so 6x+y+x=70 given
=>7x+y=70............(2)
let their sum be 140 after h years.
so age of father at that time is 6x+h
mother is y+h
son is x+h
given the new sum is 2*70=140
so 6x+h + y+h + x+h =140
=>7x+y+3h=140
from (2) we get,
3h=70 or h=70/3
another condition father's age after 70/3 years is 6x+70/3
son's age after 70/3 years is x+70/3
given 6x+70/3 =2(x+70/3)
this implies x=70/12
putting this in (2) we get y=350/12=29.1667years
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