Benjamin is riding a unicycle. The tire of his unicycle has a circumference of 2.8m, and the tire revolves 1.5 times per second.

Question

What is the distance Benjamen traveles in 100 seconds?

Answer 1

The wheel makes 1.5 revolutions per second.

In 100 seconds it will revolve 100 * 1.5 = 15 times (revolutions). Revolutions/sec * sec = revolutions

Each revolution travels 2.8 m.

In 15 revolutions is will travel 2.8 * 15 = 4.2 m.  m/revolution * revolutions = m

 

The trick with "rate" problems usually is to make the units work!