Let the car be at the origin. The bike is wwest of the car and heading east, so it's didtance at time t is 30-90t km. The car is heading north at 60, so it's distance at time t is 60t.
The distance between them is ol' Pythagoras:
Hello. I am having troubles working out this qus. Could you please show me, thanks ^^
1) A motorbike is 30 km directly west of a car and begins moving east at 90km/h. At the same instant, the car begins moving north 60km/h. What will be the minimum distance between the vehicles?