Question

A family left their house in two cars at the same time. One car traveled an average 7 miles per hour faster than the other. When the first car arrived at the destination after 5 1/2 hours of driving, both cars had driven a total of 599.5 miles. If the second car continues at the same average speed, how much time, to the nearest minute, will it take before the second car arrives?

Answer 1

I think it is 15.57.