Question

Sham covers a certain distance by the car at 35 km/hr and he returns back to the starting point by scooter with the speed of 25 km/hr. Find the average sped for the whole journey.

Answer 1

Let the distance covered during the first half journey be x.

Speed during first half = 35 km/h

Time taken = $\frac{x}{35}$

Distance covered during return journey is also x.

Speed during return journey = 25 km/h

Time taken = $\frac{x}{25}$

Average speed = $\frac{2x}{\frac{x}{35} +\frac{x}{25} }$

Average speed = $\frac{175 \times 2}{12}$

Average speed = 29.16 km/h

Hence, the average speed for the entire journey is 29.16 km/h

Answer 2

Answer:

29.16km/hr

is the answer

thank you