Question

Mary and Jerry are exercising on a track. ?Mary is walking at the rate of 3 miles per hour. Jerry starts jogging at a rate of 4 miles per hour after Mary has been walking for 15 minutes. Jerry jogs 2 miles as Mary continues walking, and they both stop at the same time. Enter the total distance, in miles, that Mary walks around the track.

Answer 1

0.75+ 1.5 = 2.25 miles

Explanation:

1) The distance Mary (M) had walk when Jerry (J ) jogging
-M has been walking for 15 minutes = 0.25 hour
V= d/t===> d = Vx t = 3 (0.25) = 0.75 mies.
2) Time that J jogs 2 miles at the rate 4 mph...
V= d/t ====> t = d/V = 2 miles/4 miles = 0.5 hours

3) The distance for M can walk in 0.5 hours at the rate 3mph.
V = d/t ====> d = V x t = 3 (0.5) = 1.5 miles.

4) total distance (d) that M walk around the track is
0.75 + 1.5 = 2.25 miles

Answer 2

.75 + 1.5 = 2.25 mi or 2 1/4mi

Explanation: