Tutors Answer Your Questions about Rectangles (FREE)
Question 703612: Hi. I don't know how to set up this problem, let alone solve it. Thanks in advance.
A box, with rectangular sides, base and top is to have a volume of 2 cubic feet. It has a square base. Express the surface area A of the box in terms of the width w of the base. If the material for the base and top costs 30 dollars/ft^2 and that for the sides costs 40 dollars/ft^2 express the total cost C as a function of the width.
A(w)= _________ ft^2
C(w)= _________ $
Click here to see answer by josgarithmetic(39617) |
Question 703819: The length of a rectangle is a = 3 cm less than twice the width. Express as an integer the maximum width of the rectangle when the perimeter is less than 69 cm.
All I have so far is 2W-a
I really just need to figure out how to set up the problem. The answer would be great as well so I can check my answer after working it out. Thank you so much for the assistance.
Click here to see answer by josgarithmetic(39617) |
Question 703889: A field is in the form of a rectangle of length 18m and width 15m. A pit, 7.5m long, 6m broad and 0.8m deep, is dug in a corner of the field and the earth taken out is spread over the remaining area of the field. Find out the extent to which the level of the field has been raised?
Click here to see answer by checkley79(3341) |
Question 703964: The length of a rectangle is a = 3 cm less than twice the width. Express as an integer the maximum width of the rectangle when the perimeter is less than 80 cm.
This is what I have:
80=6w-6
+6 +6
86=6w
------
6 6
14.3333333=w
14.33=w
Click here to see answer by DrBeeee(684) |
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