Yesterday, noah ran 2 1/2 miles in 3/5 of an hour. Emily ran 3 3/4 miles in 5/6 hour. Anna ran 3 1/3 in 3/5 hour. How fast, in miles per hour l, did each person run? who ran the fastest?

To calculate the speed of each one we proceed as follows:

speed=distance/time

a] Noah's speed:

distance=2.5 miles

time=3/5 hours

speed = (2 1/2) / (3/5)

= (5/2) / (3/5)

=5/2*5/3

=25/6

=4 1/6 mi/hr

Emily's speed

distance=3 3/4 miles

time=5/6 hour

thus

speed = (3 3/4) / (5/6)

=15/4) / (5/6)

=15/4*6/5

=4 1/2 mi/hr

Anna's speed:

distance=3 1/3 miles

time=3/5

speed = (3 1/3) / (3/5

= (10/3) / (3/5)

=10/3*5/3

=5 5/9 mi/hr

Anna was the fastest