How far do kala live from the mountains

Recall your d = rt, distance = rate * time.

let's say the rate of speed for Kala was "r" on the way over to the mountains.

Now, on the way over, it took 8 hours due to heavy traffic, whilst on the way back it took only 5 hours since there was no traffic.

The distance covered, say "d" miles, is the same on the way over as well as on the way back.