I have no clue how to solve these 2 word problems!
1. Chris cuts half a rectangular lawn 40m by 30m, by mowing strips of equal width around the perimeter. Jeri cuts the small rectangle that's left. How wide a strip does Chris cut so that they share the work equally?
2. Dieter makes a journey of 430km travelling 160km by bus and 270 km by car. If the car averages 10km/h faster then the bus and the whole trip takes 5 hours, what is the speed of the car?