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December 20, 2014

December 20, 2014

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

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

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 3:53pmThe 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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