SOLUTION: A piece of pipe is 40 in. long. It is cut into three pieces. The longest piece is 3 times as long as the middle-sized piece, and the shortest piece is 23 in. shorter than the long

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A piece of pipe is 40 in. long. It is cut into three pieces. The longest piece is 3 times as long as the middle-sized piece, and the shortest piece is 23 in. shorter than the long      Log On


   



Question 1194530: A piece of pipe is 40 in. long. It is cut into three pieces. The longest piece is 3 times as long as the middle-sized piece, and the shortest piece is 23 in. shorter than the longest piece. Find the lengths of the three pieces of pipe.

Found 3 solutions by Alan3354, MathTherapy, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A piece of pipe is 40 in. long. It is cut into three pieces. The longest piece is 3 times as long as the middle-sized piece, and the shortest piece is 23 in. shorter than the longest piece. Find the lengths of the three pieces of pipe.
--------------
L = longest piece, etc
---
L = 3M ---> M = L/3
S = L - 23
================
L + M + S = 40
L + L/3 + (L-23) = 40
2L + L/3 = 63
6L + L = 189
L = 27
----
M = 9
S = 4

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!
A piece of pipe is 40 in. long. It is cut into three pieces. The longest piece is 3 times as long as the middle-sized piece, and the shortest piece is 23 in. shorter than the longest piece. Find the lengths of the three pieces of pipe.
Let middle piece's length be M
Then longest's and shortest's lengths are: 3M and 3M - 23, respectively
We then get: M + 3M + 3M - 23 = 40
7M = 63
Middle piece's length, or highlight_green%28matrix%281%2C6%2C+M%2C+%22=%22%2C+63%2F7%2C+%22=%22%2C+9%2C+inches%29%29
You should now be able to find the length of the other 2 pieces.

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
                NUMBER
LONG            x+23
MIDDLE         (1/3)(x+23)
SHORT            x
Sum             40

%28x%2B23%29%2B%281%2F3%29%28x%2B23%29%2Bx=40
-
3%28x%2B23%29%2B%28x%2B23%29%2B3x=120
3x%2B69%2Bx%2B23%2B3x=120
7x=120-69-23
7x=28
highlight%28x=4%29
.
.