A car during its journey travels 40 min at aspeed of 30kmph, another 50 min at aspeed of 60kmph and 1 hr at aspeed of 30kmph. Find the average speed of the car.
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Answer:
40km/h
Explanation:
40/60 (of an hour) x 30 k/hr = 20 km
50/60 x 60=50 km
1 x 30 =30 km
add those together and you went 100km
40 min+50min+60min = 150 min = 150/60 hr
velocity = distance/time = 100/(150/60)= 100 x 60/150 =6000/150 = 40 km/hr
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