Homework Help: physics

Posted by srikala on Friday, May 25, 2012 at 4:33am.

a boy walks to his school at a distance of 6km with constant speed of 2.5 k mph and walks back with a constant sped of 4 k mph. His average speed of round trip expressed in k mph is?

physics - Henry, Saturday, May 26, 2012 at 12:17pm
V = (2.5+4) / 2 = 3.25 kmh.

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