SOLUTION: The diagonal of a rectangle is 20 in long. The rectangle's length is 3 times its width. Find the length of the rectangle.

Question 141756: The diagonal of a rectangle is 20 in long. The rectangle's length is 3 times its width. Find the length of the rectangle.
Answer by Shifa(4) (Show Source): You can put this solution on YOUR website!
Diagonal of rectangle=20
Breadth of rectangle=x
Length of rectangle=3x
Therefore by pythagoros theorem,
"3x"square + "x"square="20"square
"4x"square = 400
"x"square = 400/4
"x"square = 100
x = 10

Thus, Breadth = 10
Length = 3x
= 3*10
= 30
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