Car A and Car B leave the origin at noon Car A travels north

Car A and Car B leave the origin at noon. Car A travels north at 99 mph and car B travels east at 168 mph.
(a) How far apart are they after 1 hour?
(b) How far apart are they after t hours?
(c) When are they 1560 miles apart?

Solution

a) sqrt (99^2 + 168^2) = 195 miles (Pythagoras)
b) 195t miles
c) 8 hours