6. An open box is formed by cutting squares with side lengths of 3 inches from each corner of a square piece of paper. What is a side length of the original paper if the box has a volume of 675 cubic inches?
(Points : 3)
21 inches
24 inches
33 inches
36 inches
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OpenStudy (anonymous):
What would be my equation?
OpenStudy (anonymous):
(x-3)*3?
OpenStudy (cwrw238):
no volume = height * area of the base
OpenStudy (anonymous):
So just solve that equation?
OpenStudy (anonymous):
So solve that equation?
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OpenStudy (anonymous):
It does not make sense! it say,s x=−12,18
OpenStudy (anonymous):
Just what is the answer?
OpenStudy (anonymous):
My session is bout to end! I will give medal
OpenStudy (cwrw238):
you haven't spotted my deliberate mistake then?
OpenStudy (cwrw238):
length of side of the base = (x - 6) , height = 3
3(x -6)^2 = 675
(x - 6)^2 = 225
x-6 = 15
x = 21
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OpenStudy (anonymous):
You keep deleting your answers
OpenStudy (cwrw238):
i know - that was all wrong
the lengths of the base of the box = x - 3 - 3 = x - 6
- 2 lots of 3 inches have to be subtracted