Question

A starts 3 hours after B who rides 12 km an hour and overtakes him after 5 hours at what rate is A is travelling​

Answer 1

Step-by-step explanation:

Let A travel at a speed of X km/hr

Speed of B = 12km/hr.

So distance covered in 3hrs = 36km

B is 36km ahead of A

Since both move in same direction: relative speed = (12-X)km/hr.

T = 5hrs given

D = SxT

36 = (12-X) x 5

36 = 60 - 5X

5X = 24

X = 24/5 = 4.8Km/hr

I'm sure this is not the right answer but I tried.

Please let me know if someone can give a proper solution.