Question

Arnav takes 30 minutes to reach his office by car at an average speed of 35 kilometre per hour what should be the average speed of a car if you wishes to reaches office in 25 minutes​

Answer 1

To complete the journey in 25 minutes the average speed should be 42km/h.

Given data :

Average speed = 35km/h

Total time = 30 minutes

So,he travels

1 hour = 60 mins = 35 km

1 min = 35/60 km

30 mins = 35×30/60 = 17.5 km

So,

If he wishes to complete the journey in 25 minutes,the speed will be =

25 minutes = 17.5 km/h

1 minute = 17.5/25 km/h

60 minutes = 17.5×60/25 = 42km/h (answer)