Question

A car leaves town heading west at 57km/h. A second car leaves town 2 hours after the first car, but it is traveling at 72km/h. To the nearest hour, when will the second car pass the first?

Please help and explain!

Answer 1

let x be the number of hours, which is what we're looking for\[57x + 114 = 72x\]
57x and 72x are the distances of the 2 cars after x hours. 114 is the lead distance of the first car\[x = 7.6 hours or 8 hours rounded off \to the nearest hour\]

Answer 2

after 7.6 hours or 8 hours rounded off to the nearest hour

Answer 3

thanks!