Ya, can't help if you don't show the questions.
The length is 3 times longer than the width (7)
3 x 7 = 21
the length is 21.
To find perimeter, add all sides together:
21 + 21 + 7 + 7 = 42 + 14 = 56
56 ft is your answer
hope this helps
First time = 7:12
second time = 7:40
40 - 12 = 28
28 minutes have past