A storage tank holds 235,500 in3 of a chemical. The chemical is dispensed to completely fill 25 identical cylindrical containers, each with a radius of 5 in. What is the height of the cylindrical containers? Use 3.14 to approximate pi.
Answers
Volume of a cylinder: Pi*(radio)^2*height = 3.14*(2.5in)^2*height = 9420 in^3
Then height = 9420 in^3/(3.14*6.25in^2) = 480 in.
Answer: 480 in.
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-c -c
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A. Write an expression to represent the width of the garden in terms of length
Answers
Length = L
Width = L + 7
Since area = length x width, then
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w = 30/L - 7
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Answers
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Answers
-- The smallest perimeter you can make with a certain area
is a circle.
-- The NEXT smallest perimeter with the same area is a square.
With 1-ft by 1-ft square bricks, the shortest perimeter she could
make would be by using her bricks to make it as square as possible.
Without cutting bricks into pieces, the best she could do would be
(13 bricks) x (3 bricks) .
= (13-ft) x (3-ft)
Perimeter = (2 x length) + (2 x width)
= (2 x 13-ft) + (2 x 3-ft)
= (26-ft) + (6-ft) = 32 feet <== shortest perimeter.
-- Then, the more UNSQUARE you make it, the more perimeter
it takes to enclose the same area. That means Mary has to make
a rectangle as long and skinny as she can.
The longest perimeter she can make (without cutting bricks into
pieces) is (39 bricks) x (1 brick) .
= (39-ft) x (1-ft) .
Perimeter = (2 x length) + (2 x width)
= (2 x 39-ft) + (2 x 1-ft)
= (78-ft) + (2-ft) = 80 feet .
What she'll have then is a brick path, 39 feet long and 1 foot wide,
and when you walk on it, you'll need to try hard to avoid falling off
because it's only 1 foot wide.
The largest perimeter possible is 80ft.
What is the greatest perimeter that can be made?
The greatest perimeter is obtained when we put all the bricks on a single line. That is because in this case, we do not have internal bricks that do not apport to the perimeter.
In that case, we would get a rectangle that measures 39 ft by 1ft, then the perimeter is:
P = 2*(1ft + 39ft) = 80ft
The largest perimeter possible is 80ft.
If you want to learn more about perimeter:
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