Question

Total journey is of 600 kilometre a bus travel first 120 km of trip at a speed of 40 km what should be for next 480 km so that average speed is 60 km per hour

Answer 1

Answer:

Explanation:

here, average speed = total distance travelled / total time taken.

 so, 60 = 600/ total time

this gives total time = 10 hours.

now time taken for first 120 km trip = distance travelled / speed

                                                            = 120 / 40 = 3 hours

so for the second journey takes - 10-3 = 7 hours.

speed = distance / time

           = 480 / 7

so speed for next 480 km = 480 / 7 km/hr