Answer:
- 15
Step-by-step explanation:

He practiced for 1 hour and 30 minutes
The answer is 29.5
Okkkkkkkkrrrrrrrr It is a long division just use calculator
Width = X
Length = X + 15
Perimeter of a Rectangle = 2W + 2L
2(X) + 2(X + 15)
2X + 2X + 30
4X + 30
Answer = 4X + 30
Hope this helps! :)