answer
15 seconds
set up distance equation
to find the shortest distance between corners, we can use the Pythagorean theorem

a is the width or 160 feet
b is the length or 300 feet
find distance
plug in values to find c, the distance


115600 =

c =

c = 340 feet
set up time equation
to find the time it takes to run from corner to corner, we can use the equation

find speed in feet/second
convert the speed of 15 miles/hour into feet/second

= 22 feet/second
find time
since we now know distance and speed with the appropriate units, we can find time
plug values into

distance = c = 340 feet
speed = 22 feet/second

time = 15.4545 ≈ 15 seconds