Tutors Answer Your Questions about Surface-area (FREE)
Question 1158794: 1. How many yards of lace trim should be purchased to make borders for two rectangular tablecloths each with width 4 feet and length 6 feet?
2. How many centimeters of edging are needed for a rectangular table measuring 2.5 meters by 5 meters?
Click here to see answer by MathLover1(20850)   |
Question 1158863: What is the area of a rectangle in meters squared that has a length of 9 meters and a width that is two-thirds times the length?
(Is there an error in the answer choices?)
A 63
B 27
C 72
D 162
length = 9
width = 2/3 x 9 = 6
9 x 6 = 54
Is 54 the correct answer?
Click here to see answer by Cromlix(4381)  |
Question 1158880: 2. Donnie wanted to build a rectangular sandbox with a lid. The sandbox will have a length of 5 feet, a width of 3 feet, and a height of 2 feet. At least how much wood will Donnie need? ---I would like help setting this problem up on desmos (calculator) Please ..the rest i can figure out. Thank you!!
Click here to see answer by solver91311(24713)  |
Question 1158925: A Norman window is constructed by adjoining a semicircle to the top of an ordinary rectangle window . The perimeter of the window is 8 meters.
1.1 write the area A of the window as a function of r
1.2 what dimensions (length and breadth of rectangle of semicircle) will the produce a window of maximum area? Write these dimensions in terms of Pi(3.14) and simplify as far as possible.
Diagram (without the semicircle on top)
______________________
|……………… .<— r —> …| ^
|………………………………| |
|………………………………| x
|………………………………| |
|………………………………| |
______________________
<————x-2r ————>
N.B I have tried to show to the diagram just the semicircle on top
Click here to see answer by ikleyn(52781)  |
Question 1159566: 6) A square rock garden with sides of 120 feet is placed in the middle of a circular grass yard. If the circumference of the yard is 500 feet, then how much area is covered by grass?
For all calculations involving π, use π ≈ 3.14.
Hint: Be careful that you do not do any rounding on answers until the very end of a problem part, or you could create rounding error.
a) Amount of area covered by grass, measured in square feet = ____ square feet.
DO NOT TYPE COMMAS. Round your answer to 2 decimal places as needed.
b) Amount of area covered by grass, measured in square yards = ____ square yards.
Round your answer to 2 decimal places as needed
Click here to see answer by solver91311(24713) |
Question 1160168: A pen is to be formed by enclosing a rectangular fenced area in an open field. The pen must also be split in half by fence. This will separate the cows and horses from each other. Given that you only have 600m of fence to close the pen, what are the dimension of the pen that will give the animals the maximum area?
Thank you
Click here to see answer by ikleyn(52781) |
Question 1160308: At an office there is a cylindrical water cooler that has a radius of 15cm and a height of 40cm. The paper cups are cone-shaped with a radius of 5 cm and a height of 10cm.
How many cups of water could be taken from the water cooler before it needs replacement? Include a diagram of the cooler and the paper cup.
3
(hint 𝑉 = 𝐵𝑎𝑠𝑒 𝐴𝑟𝑒𝑎 × 𝐻𝑒𝑖𝑔h𝑡 and 𝑉 = 𝐵𝑎𝑠𝑒 𝐴𝑟𝑒𝑎 ×𝐻𝑒𝑖𝑔h𝑡 )
Click here to see answer by josgarithmetic(39617) |
Question 1160594: Kidney outer and inner shape. If I know the distance in feet around the outer irregular shape and the distance around the inner irregular shape how do I compute the square footage of the area between the 2 shapes?
Click here to see answer by ikleyn(52781) |
Question 1160594: Kidney outer and inner shape. If I know the distance in feet around the outer irregular shape and the distance around the inner irregular shape how do I compute the square footage of the area between the 2 shapes?
Click here to see answer by Alan3354(69443)  |
Question 1161227: Consider the function
Hint: This is the upper half of a circle of radius 2 positioned at (0, 0).
Find the area (in  ) between the x-axis and the graph of f over the interval [−2, 2] using rectangles. For the rectangles, use squares 0.8 by 0.8 units, and approximate both above and below the lines.
above: ?
below: ?
Use geometry to find the exact answer (in ).
exact answer: ?
Click here to see answer by KMST(5328)  |
Question 1161410: Hello,
I need help with this question:
A cylinder has a radius of 4 inches and a height of 14 inches. If a 6-inch strip is cut off around the top of the cylinder, what would be the new total surface area of the cylinder?
Any help is appreciated.
Click here to see answer by josgarithmetic(39617) |
Question 1161636: What is the maximum number of triangular pieces which can be cut from a sheet of plywood?
The plywood is shaped like a parallelogram with a base measuring 6 meters. While the triangular piece is a right triangle with a base measuring 2 meters.
Thanks in advance!
Click here to see answer by solver91311(24713) |
Question 1161726: A component (circle-shaped with a diameter measuring 60 cm) is stamped out of sheet steel. A square(with side measuring 30 cm) in the center of that circle is discarded. These components are stamped out of a continuous steel coil with a width of 70 cm. The stamping process requires a gap of 25mm between each component. The steel coil is supplied in lengths of 25 meters costing $200.
a) What is the approximate percentage of steel wasted including the center square?
b) Assuming minimal wastage, how many components can be produced from each 25-meter coil?
c) What is the approximate cost of a component if the scrap is sold at 50% of the cost?
Click here to see answer by solver91311(24713) |
Question 1161726: A component (circle-shaped with a diameter measuring 60 cm) is stamped out of sheet steel. A square(with side measuring 30 cm) in the center of that circle is discarded. These components are stamped out of a continuous steel coil with a width of 70 cm. The stamping process requires a gap of 25mm between each component. The steel coil is supplied in lengths of 25 meters costing $200.
a) What is the approximate percentage of steel wasted including the center square?
b) Assuming minimal wastage, how many components can be produced from each 25-meter coil?
c) What is the approximate cost of a component if the scrap is sold at 50% of the cost?
Click here to see answer by KMST(5328) |
Question 1162352: Determine the total surface area in square meters of a grain silo with cylindrical shape with a conical roof. Diameter of the cylinder is 20 meters, the height of the cylinder is 15 meters from the ground, and height of cone is 4 meters from the top of cylinder. Total surface area shall include the base of cylinder (floor).
Click here to see answer by greenestamps(13200)  |
Question 1162520: a^2 + 12^2 = 16^2 Square the 12 and 16. Then subtract and take the square root.
You will then have the other side of the rectangle as well as the diameter of the circle. You will need to divide it by 2 to get the radius.
Area of rectangle - Area of circle
LW - pi r^2
a^2 = 112 From here, take the square root of both sides. Use the square root button on your calculator. Divide this value by 2 to get the radius.
Then, plug into A = pi r^2 to get the area of the circle. This is also one of the sides of the rectangle, and the other side is 12. Use A = lw to find the area. Last, subtract the two areas. please help me I am confused.???
Click here to see answer by ikleyn(52781) |
Question 1162523: a^2 + 12^2 = 16^2 Square the 12 and 16. Then subtract and take the square root.
You will then have the other side of the rectangle as well as the diameter of the circle. You will need to divide it by 2 to get the radius.
Area of rectangle - Area of circle
LW - pi r^2
a^2 = 112 From here, take the square root of both sides. Use the square root button on your calculator. Divide this value by 2 to get the radius.
Then, plug into A = pi r^2 to get the area of the circle. This is also one of the sides of the rectangle, and the other side is 12. Use A = lw to find the area. Last, subtract the two areas. please help me I am confused.???
these are the same question. it is a rectangle with a circle in it, the width of the rectangle is 12mm, the length is 16mm from the upper right hand corner down through the circle to the left bottom corner, i need to know the shaded area around the circle.
Click here to see answer by solver91311(24713) |
Question 1162769: An old dilapidated bungalow has just been bought and the new owner wanted to give a
fresh look by constructing a rectangular garden on its backyard. The length of a
rectangular garden in 5 m more than its width and the area is 50 m2
. Find the length,
width and perimeter of the garden.
Click here to see answer by ikleyn(52781) |
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