23. The lengths of the 3 sides of a triangle are in the ratio 5:6:9. The perimeter of the triangle is 100 inches. What is the length, in inches, of the longest side of the triangle?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Assume that the length of the shortest side is 5x, so the lengths of the other two sides are 6x and 9x, the sum of 5x, 6x and 9x is 20x, which is equal to 100, and x=5. The longest side is 9×5=45. Choose D.