Answer:

Karthik's speed = 7.69 m/s

As Karthik's speed is greater than Arun's speed, Karthik ran faster than Arun.

Answer:

Obviously Karthik coz he completed it in only 13 sec

Explanation:

This question is soo muchhh easyy..

we just have to use our common sense which is not common in common ppls