a toy moving from A to B at constant speed of 20km/hr. it mediately return to A at constant speed v .If average speed is 24km/hr. what is v
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average speed of same distance
(2*x*y/X+y)
24=(2*20*y/20+y)
3(20+y)=5y
60=2y
y=30
(2*x*y/X+y)
24=(2*20*y/20+y)
3(20+y)=5y
60=2y
y=30
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