Here you go. A quick picture to demonstrate the problem. Hope this helps!! <span />
Find the average.
6+4=10
10/2=5
It takes 5 hours
The answer is 4.
36/63 = 0.57
4/7 = 0.57
Perimeter= (2 x Length) + (2 x width)
Do to find width:
Width= perimeter - (2 x length)
So now substitute in an equation
W= 154 - (55 x 2)
W= 154-110= 44
Remember 44 would equal the width when it is multiplied by 2. Now you have to divide by 2 to get the original.
Answer is 22