Question

A car travels a distance of 2000 m. If the first half distance is covered at 40 km/hour and the second half at velocity v and if the average
velocity is 48 km/hour then the value of v is
O 56 km/hour
O 60 km/hour
O 50 km/hour
48 kom hour​

Answer 1

Option 2nd is write answer

60 km/hr

1st half=1/40km/hr. 2nd half 1/v km/hr average speed=total distance/total time taken

Avg.speed=2/1/40+1/v. Given avg.velocity=48km/hr so solve them then we get 60 km/hr .l

Hope it helps ❣️

Answer 2

Answer:

Av. Speed = (total distance travelled÷total time taken)

Now coming to this question,

Time taken in first 40km=(40÷80) =1/2 hour

Time taken to travel next 40km=(40÷40) =1 hour

Now total time taken to travel 80km= 1/2+1 = 1.5hours,

According to formula mentioned above,

Av. Speed = 80/1.5 = 53.33km/h.

Hope that it is clear.

Explanation:

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