Create a free account!

When you create an account, we'll save your progress. Plus, you'll have access to some cool tools, like reports, assignments, gradebook, and awards.

Jack needs to go from City A to City B. He can travel 21 km at a speed of 120 km/h if he goes by train or 18km at 98km/h if he takes the bus instead. Which way should Jack take in order to get City B in the least amount of time? Use the formula d = rt.