Question

ab bus travel a distance of 120 km with the speed of 40 km per hour and returns with a speed of 30 kilometre per hour calculate the average speed for the entire exam in Journey ​

Answer 1

Answer:

34.2857 kmph

Explanation:

t1 =120/40 = 3 h

t2 =120/30 = 4h

avg speed = (120+120)/(3+4) = 240/7 = 34.2857 kmph

Answer 2

Explanation:

》time 1=120/40=3hr

》time2=120/30=4hr

》average speed =total distance travelled/ total time taken

》 =120+120/3+4

=240/7 km / hr

= 34.29 km/hr

I hope my ans is correct