Question 694781: ten years ago,arun's father was four times older than his son.after ten years, the father will be twice older son. the present age of arun find solution
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! ten years ago,arun's father was four times older than his son.after ten years, the father will be twice older son. the present age of arun.
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Equatiion:
f-10 = 4(s-10)
f+10 = 2(s+10)
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Rearrange:
f - 4s = -30
f - 2s = 10
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Subtract and solve for "s":
2s = 40
s = 20 yrs (son's age now)
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Solve for "f":
f = 2s+10
f = 40+10
f = 50 yrs (father's age now)
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Cheers,
Stan H.
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