Friday

October 31, 2014

October 31, 2014

Posted by **StuartKess** on Saturday, October 15, 2011 at 8:54am.

Ps: how do I do this type of question?

What are the fixed steps?

- Math -
**Jai**, Saturday, October 15, 2011 at 9:16amfirst represent the unknowns using variables:

let 2x = shortest piece

let 7x = 2nd longest piece

let 11x = longest piece

from the second statement, the longest piece is 72 longer than the shortest:

11x = 72 + 2x

solving for x,

11x - 2x = 72

9x = 72

x = 8

the length of the original rope is the sum of all lengths:

2x + 7x + 11x

20x = 20*8 = 160 cm

hope this helps~ :)

- Math -
**StuartKess**, Saturday, October 15, 2011 at 9:48amThanks!!! :) is there any shorter ways? :)))

- Math -
**StuartKess**, Saturday, October 15, 2011 at 9:55amWhy 72 + 2x = 11x ?

Would you be able to list some of the common sentences for forming this type of equations? Thanks!! :)))

**Answer this Question**

**Related Questions**

Algebra - A rope 116 inches is cut into three pieces.The middle-sized piece is ...

math - A carpenter sawed a piece of wood into 3 pieces. The ratio of the pieces ...

Algebra - Here's another problem I'm having a little trouble with: A piece of ...

Math algebra - A 120- foot long rope is cut into three pieces the first piece of...

MATH - The 120-foot rope is cut into 3 pieces.The first of rope is twice as long...

math - a 45 inch rope is cut into 3 pieces. the first piece of rope is 3 inches ...

math homework - A37 foot long Submarine sanwich is cut in to three piece.the ...

algebra - A 120-foot-long rope is cut into 3 pieces. The first piece of rope is ...

Algebra - A ribbon 106 inches long is cut into three pieces. The middle-sized ...

Math - a 120 foot long rope is cut into 3 pieces. the first piece of rope is ...