Relative Speed Questions

A train can travel $75\%$ faster than a car. Both start from point A at the same time and reach point B, $70\text{km}$ away from A, at the same time. On the way, however, the train lost about $18$ minutes while stopping at the stations. The speed of the car is:

What is the combined length of two trains when one, moving at $80\text{km/hr}$, crosses another, travelling in the same direction at $44\text{km/hr}$ in $40$ seconds?