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December 22, 2014

December 22, 2014

Posted by **M.A.** on Thursday, June 18, 2009 at 6:39am.

- math..word problem -
**DrBob222**, Thursday, June 18, 2009 at 5:03pmtime(up) = distance/rate = d/15

time(down) = d/r = d/30

Add time up to time down to get

(d/15)+(d/30) = total time = 4.

Solve for d.

[Remember: time(up) + time(down) = 4.0 hr]

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