Two towns A and B are $180 \mathrm{kms}$ apart. Car 1 and car 2 start
travelling from $A$ and $B$, respectively towards each other. Their
speeds are in the ratio $1: 2$ and they start at 7:00 arm. and 8:00
a.m., respectively. After meeting at $\mathrm{C}$, they return to their starting
positions and again start travelling towards each other. In order to
meet car 1 for the second time at $\mathrm{C}$, car 2 halts at $\mathrm{C}$. For how much in hrs does it halt?

TITA type i.e. Type In The Answer type

2hrs

Let them meet at time $T$. this.
Reaches C again at 7+3(T-7)

Reaches D again at 8+3(T-8)
Difference is 2 hrs