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April 19, 2014

April 19, 2014

Posted by **anoynomous** on Thursday, March 7, 2013 at 7:18am.

- maths-equation -
**Reiny**, Thursday, March 7, 2013 at 10:32amtime for first part = d/12

time for return = d/9

d/12 + d/9 = 7/3

times 36

3d + 4d = 84

7d = 84

d = 12

the distance was 12 km

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