November 27, 2015

Homework Help: math...?

Posted by dawn on Monday, March 21, 2011 at 11:02pm.

to save fuel on the 240 km trip to the cottage, the Nakamura family reduce their usual average speed by 20 km/h. this lengthens their journey by 1 hour. what is the slower average speed?

i was told this question is not complete to answer? is that true?

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