Q1 A car travels along a straight line for first half time with Speed 40 km/ h and the second half time with speed 60 km / h.Find the average speed of the car.
50 km/ h
40 km/ h
20 km / h
Answers
Answered by
2
Answer:
the average speed of car is 50 km /h
Answered by
0
Answer:
48km/hr
Explanation:
Average speed is total distance travelled divided by total time taken.
Let the distance travelled is 2x or half of distance is x.
The first half of distance x is travelled with speed of 40km/hr , so time taken is x/40hr.
Similarly time taken to travel remaining x km is at speed of 60km/hr, so time taken for this 2nd half of distance is x/60.
Now, total time taken to travel 2x distance is x/40+x/60 hr or 3x/120+2x/120hr or 5x/120 hr or x/24 hr.
The average speed of car is 2x/x/24 or 2*24 km/hr or 48km/hr.
Similar questions