In this lesson you will learn how to solve simple time problems. For these problems, all you need to remember is the formula D = rt and how it applies.

Colleen cycles 3 times as fast as she runs. If it takes her 42 minutes to run 5 miles, how long does it take her to cycle the same distance?

minutes

Because her rate triples, her time decreases because the distance stays the same. So it takes her 42/3 = 14 minutes.