Bindu's bike tires have a radius of $30 \mathrm{~cm}$. She rides her bike far enough that the tires rotate exactly five times. How far does Bindu's bike travel?
(A) $60 \pi \mathrm{cm}$
(B) $30 \pi \mathrm{cm}$
(C) $900 \pi \mathrm{cm}$
(D) $300 \pi \mathrm{cm}$
(E) $150 \pi \mathrm{cm}$
The circumference of each of Bindu's bike tires is $2 \times \pi \times 30 \mathrm{~cm}=60 \pi \mathrm{cm}$.

If the bike tires rotate exactly five times, then the distance travelled by Bindu's bike is $5 \times 60 \pi \mathrm{cm}=300 \pi \mathrm{cm}$.

ANSWER: (D)