A man walks 5km at an average speed of 4km/ hr an again travels 3 km at an average speed of 2 km/ hr his average speed for the entire trip is in
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Average speed is 2.9km/hr
or approximately 3km/hr
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time taken to walk 5km = 5/4
time taken to walk 3km = 3/2
( using distance /time = speed formula)
So, Avg. speed = total distance covered/ total time taken
= (5 + 3)/ [(5/4) + (3/2)]
= 64/22 = 2.9 km/hr = 3 km/hr (approx.)
time taken to walk 3km = 3/2
( using distance /time = speed formula)
So, Avg. speed = total distance covered/ total time taken
= (5 + 3)/ [(5/4) + (3/2)]
= 64/22 = 2.9 km/hr = 3 km/hr (approx.)
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