Question

What is the average speed of a car going with speed of 40km/hr and returning with a speed of 50km/hr

Answer 1

Hey.

Here is the answer.

let the total distance travelled by car be 2x km.

total time taken= x/40 +x/50 h
= 5x+4x/200 =9x/200 h

as average speed= total distance/total time
so, average speed= 2x / 9x/200 = 2×200/9= 400/9 km/h
= 44.44km/hr

Thanks .