Question

O) A minibus drives 40.2 km with a constant speed
of 67 km/h and another 77.3 km with a constant
speed of 103 km/h. What is its average speed for
the total trip?​

Answer 1

Step-by-step explanation:

The time taken by the minibus to travel 40.2 km with a constant speed of 67 km/h is t1=40.2/67 of an hour and to travel 77.3 km with a constant speed of 103 km/h is t2=77.3/103 of an hour. The total time is t= t1+t2 = 9319.7/ 6901 hour. The total distance travelled is 40.2+77.3=117.5 km. So the average speed for the total trip is 117.5/(9319.7/6901) or nearly 87 km per hour