Question

Jack & Joe leave their house at the same tme , drive towards each other.jack drives at60kmp and joe 30kmp.they pass each other in 1min.how far apart were Jack and joe when they started?

Answer 1

The relative velocity is

$$V=30+60=90 kmph$$

The distance:

$$S=Vt=(90 kmph)( \frac{1}{60} h)=1.5 km$$