SOLUTION: A rectangle with a perimeter of 98 feet has a length 31 feet longer than its width. What is the length of a diagonal inside the rectangle? HELP!!!

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Question 1158305: A rectangle with a perimeter of 98 feet has a length 31 feet longer than its width. What is the length of a diagonal inside the rectangle?
HELP!!!
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
length w+31
width w
w%2B31%2Bw=98%2F2
2w%2B31=49
2w=18
w=9

LENGTH, 40
WIDTH, 9

DIAGONAL
sqrt%2840%5E2%2B9%5E2%29
sqrt%281600%2B81%29
highlight%28highlight_green%2841%29%29