Running 3 miles in 20 minutes, how many miles can one run in 50 minutes?

Question

Maria can run 3 miles in 20 minutes. At this rate, how many miles could she run in 50 minutes?

I have tried dividing 3 by 20 to get the unit rate.

Hint: $\quad50=20+20+10$. – Lucian Oct 07 '14 at 00:10 — Lucian, Oct 07 '14 at 00:10
@Lucian: Why not? Simple but effective. +1 for you. – MPW Oct 07 '14 at 00:24 — MPW, Oct 07 '14 at 00:24

score 2 · Answer 1 · answered Oct 07 '14 at 00:10

2

Yes, and then multiply by that 0.15 by 50 to get the total distance of 7.5 miles.

answered Oct 07 '14 at 00:10

Mark Fischler

41,743

MPW · Answer 2 · 2014-10-07T00:23:34.357

2

Using the basic relationship $t\cdot r=d$, we have $$\require{cancel}\underbrace{50\cancel{\textrm{ min}}}_{\textrm{time}}\cdot\underbrace{\left(\frac{3\textrm{ miles}}{20\cancel{\textrm{ min}}}\right)}_{\textrm{rate}}=\underbrace{7.5\textrm{ miles}}_{\textrm{distance}}$$

edited Oct 07 '14 at 00:23

answered Oct 07 '14 at 00:14

MPW

43,638

Running 3 miles in 20 minutes, how many miles can one run in 50 minutes?

2 Answers2