SOLUTION: A rectangular piece of tin 40cm by 30cm is to be made into an open box with a base of 900cm^2 by cutting equal squares from the four corners then folding up the sides. Find the len

Algebra.Com
Question 831615: A rectangular piece of tin 40cm by 30cm is to be made into an open box with a base of 900cm^2 by cutting equal squares from the four corners then folding up the sides. Find the length of the sides of the square cut up from each side.
I drew it out and got the formula (40-2x)(30-2x) = 1200-4x^2 but am not sure how to solve or if I have the correct equation
Answer by josgarithmetic(39615)   (Show Source): You can put this solution on YOUR website!
Your equation is wrong, but you began with the correct expression for the left member.

Original area was 1200 cm^2. When the cuts and folds are done, length may become 40-2x, and width may become 30-2x, still acting as the base for the box. The base is given in this form, as 900 cm^2.

The symbolized situation for area of the base is: ;
NOW solve for x.







Quadratic equation, general form. You can finish this.
RELATED QUESTIONS

I need help on how to find the equation in quadratic word problems and my teacher doesn't (answered by ikleyn)
Solving Problems with Quadratic Equations 21. An open-topped box is to be made from a... (answered by josmiceli)
Solving Problems with Quadratic Equations 21. An open-topped box is to be made from a... (answered by mananth)
An open box is to be made from a rectangular piece of tin by cutting 2-inch squares out... (answered by josgarithmetic)
An open box is to be made from a rectangular piece of tin by cutting two inch squares out (answered by ankor@dixie-net.com)
An open box is to be made from a rectangular piece of tin by cutting two inch squares out (answered by 303795)
An open box is to be made from a rectangular piece of tin by cutting two inch squares out (answered by checkley77)
An open box is to be made from a rectangular piece of tin that is 18 cm wide and 24 cm... (answered by Earlsdon)
A open box is to be made from a 25inch by 40inch rectangular piece of cardboard by... (answered by checkley77)