Mary is walking 3 miles per hour jerry starts jogging at a rate of 4 miles per hour after marry has been walking for 15 minuets jerry jogs 2 miles as Mary continues walking and they both stop at the same time

Missing question: Determine the distanced covered by Mary.

Solution:

Mary: 3 mph

Jerry: 4 mph

Jerry starts jogging after Mary had been walking for 15 minutes.

Distance Mary had walked before Jerry starts jogging = Speed * Time = 3*15/60 = 0.75 miles.

Time taken by Jerry to jog for 2 miles = Distance/Speed = 2/4 = 1/2 = 0.5 hrs.

Since they stopped at the same time,

Distance Mary walked while Jerry jogged = Speed * Time = 3*0.5 = 1.5 miles

Therefore,

Total distance Mary walked = 0.75+1.5 = 2.25 miles.