A boy goes to his play ground from his home at a speed of 2 km/hr. He comes back from the play ground to his home at a speed of 1km/hr. The total time taken for both the journey is 6 hours, then find the distance between his home and playground?
Solution: Average speed = (2*2*1)/(2+1) = 4/3 km/hr.
Distance traveled = (4/3 * 6) = 8 km.
.'. Distance between home and play ground = 8/2 = 4 km.
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