Question

Every day, Marco runs for 45 minutes and covers 5 miles. How long would it take him to run 8 miles?

a) 9 min

b) 18 min

c) 48 min

d) 72 min

Answer 1

8/5 * 45=72

Answer 2

He takes 45 mins to cover 5 miles, so if we divide both by 5 we can find how long it takes to cover 1 mile. 45/5 = 9 mins.
Now we just times this by 8 to find how long it takes him to run 8 miles. 8x9=72 mins.

Answer 3

Ok if he runs 5 miles in 45 minutes, then he runs a mile every 9 minutes. So 8 times 9 is 72

Answer 4

45:5 = x:8
5x = 360
x = 72 minutes
using ratio and proportion

Answer 5

Thanks ALLL of you, you ALL deserve medals :D

Answer 6

No problem, Have a good one!

Answer 7

\[Speed=\frac{distance}{time}\]Just rearrange it as necessary and you can answer any of these times of questions.

Answer 8

18 min, sngles of triangles sum up to 180.

Answer 9

*TYPEs of questions :)

Answer 10

Alternatively, set up the following proportion

\(\huge\frac{45 \space \text{min}}{x \space \text{min}} = \frac{5 \space \text{mi}}{8 \space \text{mi}}\)

Then cancel min and mi to get

\(\huge\frac{45}{x} = \frac{5}{8}\)

Then cross multiply to get

\(\huge 5x = 45(8)\)

Then continue solving for x