Two friends, Robert and Sasha, are walking in opposite directions around a marsh that has a 15-mile perimeter. If Robert walks twice as fast as Sasha, how fast does Robert walk if they
meet after 2.5 hours?
Because it is 15 miles and it doesn't matter how fast Sasha walks its just that times 2.5 which in this case gets us 2 times faster assuming that Sasha is walking 5 miles an hour.
