Posted by **kola** on Tuesday, April 30, 2013 at 5:05am.

the present age of a father and his son are in the ratio 10:3. if the son is 15 years old now, in how many years will the ratio of their age be 2:1?

- mathematics -
**Reiny**, Tuesday, April 30, 2013 at 8:14am
present:

father --- 10x

son -------3x

3x = 15

x = 5

son is now 15 and father is now 50

in t years,

(50+t)/(15+t) = 2/1

30+2t = 50+t

t = 20

**in 20 years** , the father will be 70 and the son will be 35

(which is in the ratio of 2:1 )

- mathematics -
**Frontman**, Monday, May 27, 2013 at 3:53pm
The arithmetic mean of x y and z is 6 while x y z t u v and w is 9 calculate the arithmetic mean of t u v and w.

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