For each 12 mm of coloured fabric Sarah use to make her curtains she also uses 2 cm of white fabric .express the amount of white fabric to coloured fabric as a ratio in its simplest form

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?