Question 501562
This room is a type of rectangle whose Breath is 14 feet and Length is 20 feet.
First we will find the Perimeter of this rectangle

Perimeter of rectangle = 2L + 2B
Perimeter of rectangle = 2(20) + 2(14)
Perimeter of rectangle = 40 + 28
Perimeter of rectangle = 68 feet
Here we change the feet into inches, we know that 1 feet = 12 inches
Perimeter of rectangle = 68 * 12 = 816 inches
So Bug has to cover 816 inches we are to know how long it will take?
Now, it is given that Bug travels with the speed of 5 inches/minute

We also know formula for calculating speed is
speed = Distance / time
Here
Speed = 5inches / minute
time = ? we are to calculate
distance = 816

Put the above values in the formula
5 = 816 / time
time*5 = 816
time=816/5
time=163.20 minutes
to change the time into hours from minutes we have to divide the time by 60
time = 163.20/60
time = 2.72 hours

I hope above explaination will satisfy your Maths teacher !!!1