Question

A car travels from point A to point B at constant speed of 50 kilometre per hour. on return journey along the same path it travels at a constant speed of 40 kilometre per hour. find its distance travelled displacement and average speed.​

Answer 1

Answer:

=45kmph

Hope it helps you

Answer 2

Given:-

Speed from A to B= 50 km/h

Speed from B to A(return)= 40km/h

To find:-

i.displacement

ii.distance travelled

iii.average speed

Solution:-

i.Displacement of the car is zero as initial and final point is same i.e. A

ii.LCM of 50 and 40 is 200

We assume that distance from A to B is 200km

=>Time taken from A to B=200/50= 4hour

=>Time taken from B to A=200/40= 5hour

=>Total distance travelled=2(200)=400km

iii.Average speed=Total distance/Total time

Total distance=400km

Total time=(5+4)h=9h

=>400/9=44.44

Thus,average speed of the car is 44.44km/h