a parent Drives his child to school at an average speed of 10 m per second while going back he drives at 30 m per second what is the average speed of the whole trip
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Answer:
Time taken to reach school from home =
x
S
hr.
Time consumed to reach home from school =
yS
hr
Average speed =
Total time taken
Total distance
=
xS+ yS
S+S
= x1 + y12
= x+y
2xy km/hr.
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