Question

Sue ran the first 12 miles of the 24-mile Fun Run in 72 minutes. Her rate decreased by 2 miles per hour in the second half of the race. How long did it take Sue to run the second half of the Fun Run?

please show how to do this

Answer 1

its b 1.5

Explanation:

yw :P

Answer 2

90 minutes or 1.30 hours

Explanation:

In 72 minutes, Sue ran 12 miles per hour

In 1 minute, Sue ran 12/72 miles per hour

In 60 minutes, Sue ran (12/72)*60 miles per hour

= 10 miles per hour

Remaining miles after completing 12 miles in 72 minutes = (24-12) = 12 miles.

If the mileage decreases to 2 miles per hour, he will now run = (10 - 2) = 8 miles per hour.

Now,

1 hour = 60 minutes

Sue can run 8 miles in 60 minutes

Sue can run 1 miles in 60/8 minutes

Sue can run 12 miles in (60/8)*12 minutes

= 90 minutes or 1.30 hours