A particle covers 1/4th of the total distance at a speed of 20 km/hr, 1/2 of the total distance at a
speed of 40 km/hr, 1/6th of the total distance at a speed of 10 km/hr and remaining 1/12th of the
distance at a speed of 30 km/hr. What is the average speed in km/hr ?
1) 22.5 km/hr
2) 15 km/hr
3) 30 km/hr
4) 11.25 km/hr
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Answer:
30 km/hrs
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