Question

A bus travells the first one third distance at a speed of 10km/h the next one third at 20km/h. What should be its speed for the third one third distance to make the average speed for the whole journey to be 50/11 m/s ?
1) 15m/s
2)60 m/s
3) 10 m/s
4) 30m/s

Answer 1

Explanation:

3s/s/3/10+s/3/20 +s/3/v solve this u get urs velocity

OK friend then u get minus with 50/11 u get urs answer perfectly