28. Car A and car B are 120 km apart. If they move towards each other, they will meet in 1 hour. If they move in the same direction, car A will catch up with car B in 5 hours. Find the speed of car A and the speed of car B. (Assume that the speeds of the cars are constant.)
let their speeds be x & y Towards each other effective speed = x+y t= d/r 120/(x+y) = 1 x+y=120..........................(1) in the same direction effective speed = x-y 120/(x-y) =5 x-y = 24...................(2) solve (1) & (2) add 2x=144 x=72 you find out y
