Question 996195: Distance covered from home to school at 3 km/hr and school to home at 4km/hr, time taken 21 minutes, find distance from home to school.
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Distance covered from home to school at 3 km/hr and school to home at 4km/hr, time taken 21 minutes, find distance from home to school.
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Avg RT speed = 2*3*4/(3+4) = 24/7 km/hr
RT distance = (24/7)*(21/60) km
= 1.2 km
--> 0.6 km each way
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