a jeep finishes a journey in 9 hours at a speed of 60 km her hour. by how much speed should its speed be increased do that it may only take 6 hours to finish the journey?

90 km / hour.

Step-by-step explanation:

Speed = distance / time

So Distance = speed * time.

The distance is the same in both scenarios so

60 * 9 = s * 6 where s is the required speed.

540 = 6s

s = 540 / 6

s = 90 km / hour.

90 km/h

Step-by-step explanation:

If the jeep finished the journey in 9 hours and 60 km/h, then we know that the journey is 9 * 60 kilometers long, or 540 kilometers.

540 kilometers / 6 hours = 90 km/h