SOLUTION: Car A and car B leave Halifax on the same road 1 hr apart. Car A leaves first and travels at a steady 80 km/h. How fast must car B travel to overtake car A in 4 hours?

Question 466938: Car A and car B leave Halifax on the same road 1 hr apart. Car A leaves first and travels at a steady 80 km/h. How fast must car B travel to overtake car A in 4 hours?
Found 2 solutions by Big Poop, robertb:
Answer by Big Poop(157) (Show Source): You can put this solution on YOUR website!

Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Let x = speed of car B. If car B is to overtake car A in 4 hours, then car A must have been on the road for 4 + 1 = 5 hours. Hence the distance traveled by car A should have been (5 hr)*(80 km/hr) = 400 km.
==> 4x = 400 ==> x = 100 km/hr, the speed of car B.
RELATED QUESTIONS
A car leaves town at 72 km/hr. An hour later, a second car leaves the same town, on the... (answered by ewatrrr)
Two cars leave the same city, one heading north and the other heading west. The first car (answered by checkley77)
A car leaves a town traveling at 72 km/h. An hour later, a second car leaves the same... (answered by josmiceli)
A car leaves Hartford traveling north at 56 km/h. Another car leaves Hartford one hour... (answered by josmiceli)
Both car A and car B leave school at the same time, traveling in the same direction. Car... (answered by ankor@dixie-net.com)
Both car A and car B leave school at the same time, traveling in the same direction. Car (answered by algebrahouse.com)
Both car A and car B leave school at the same time, traveling in the same direction. Car (answered by math_tutor2020,josgarithmetic)
a car leaves an intersection traveling at an average speed of 56 miles per hour. ten... (answered by josgarithmetic,ikleyn)
Car A is currently 80 km south of a perpendicular intersection with an east-west road.... (answered by Fombitz)