car covers first half of distance when travelling from A to B at speed of 30kmph and second half by 60kmph find average speed?
Answers
Explanation:
Let us assume that the car has to travel a total distance of 2x km
We know Distance = speed × time
Time = distance/speed
If a car travels the first half of a distance with a speed of 30km/h
Distance = first half distance means 2x/2 = x km
Speed= 30 km/hour
Time taken in travel first half of the distance = x km/30 km per hr. = x/30 hrs.
The car cover the remaining half distance with a speed of 50km/h.
Distance = x km.
Speed = 50 km/hour
Tine taken to cover second half of the distance = x km/50 km per hr = x/50 hours
Total time taken by car to cover 2x km distance = x/30 + x/50 = 80x/1500 hrs.
Average speed of car = Total distance/total time
Average speed of car = 2x km /80x/1500 hour
2x × 1500/80x
= 3000x/80x
= 3000/80
Average speed of car = 37.5 km/hour
Answer the average speed of the car was 37.5 km / hour
Explanation:
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