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April 21, 2014

April 21, 2014

Posted by **Da S** on Tuesday, March 20, 2012 at 11:49pm.

a.find the total time taken for the whole journey

b.find the average speed for the whole journey

- math -
**David**, Wednesday, March 21, 2012 at 12:48amtotal time = 4 hours + 3 hours = 7 hours.

Avg speed = total distance / total time

Avg speed = 40 * 2 / 7 = 80/7 km/h

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