Question

a bus travel a distance of 120 km with a speed of 40 km/h and returns with a speed of 30km/h . calculate the average speed for a entire journey.​

Answer 1

Answer:

3.42 km/h 0r, 24/7 km/h

Explanation:

Given, distancecover by a bus = 120km

its speed = 40km/h

its return with speed of 30km/h

total distance = (120+120)km = 240km

total speed = (40+30)km/h = 70km/h

Average = total distance/ total speed

= 240/70 = 3.42km/h

or, 24/7 km/h Ans

Answer 2

while going

dustance=120 KM

speed=40kM/h

time120/40=3hrs

while coming

distance=120KM

speed=30KM/h

time=120/30=4hrs

total diatance=120+120=240

total time taken =4+3=7hrs

average speed =240/7=34.2KM/HR