Tutors Answer Your Questions about Surface-area (FREE)
Question 993779: You have been asked to design a can shaped like a right circular cylinder with height h and radius r. Given that the can must hold exactly 170 cm^3, what values of h and r will minimise the total surface area (including the top and bottom faces)?
Give your answers correct to 2 decimal places as a list [in brackets] of the form: [ h, r ]
for constants h (height), r (radius), in that order.
Thank you!
Click here to see answer by rothauserc(4718)   |
Question 993900: right rectangular prism has a height of 15 in, and the area of the cross section taken parallel to the base at a level of 5 in above the base is 25 in2. A right triangular prism has a height of 15 in, and the area of the cross section taken parallel to the base at a level of 5 in above the base is 25 in2. Do the solids have the same volume?
Click here to see answer by KMST(5328)  |
Question 995449: Hi, could you help me with this question? Question: The rectangular floor of a school hall of 30m long and 20m wideis to be covered with square tiles with sides of 20cm. If each tile costs RM2.50, how much money is needed to tile the floor?
Thanks,
Natalie
Click here to see answer by Boreal(15235)  |
Question 995572: Hi, i need help with this question.
Question: RM5200 is needed to put up a barbed wire fence surrounding a square field. The side of the field is 200m. Calculate the price of one metre of the barbed wire used.
Much thanks,
Natalie
Click here to see answer by ikleyn(52781)  |
Question 995569: Hi, I need help with a Perimeter and Area question, could you help me with it?
Question: RM5200 is needed to put up barbed wire fence surronding a square field. The side of the field is 200m. Calculate the price of one metre of the barbed wire used.
Thanks a lot,
Natalie
Click here to see answer by ikleyn(52781) |
Question 999005: A toy is made from a cone with a height H cm and a slant height h cm, a hemisphere with a radius 11cm.Calculate the total exterior surface area and volume of the toy in terms of H, (pine) and h and Factorized completely
Click here to see answer by mananth(16946)  |
Question 1000584: A landscape architect is planning a new nature area in middle of campus. She wants the length to be twice the width, and wants to put a 3foot high retaining wall around the perimeter. There will be 300 total feet wall installed. How wide will this area be?
I think it's α=l*w
But now I'm lost, could someone help me?
Click here to see answer by josgarithmetic(39617) |
Question 1000584: A landscape architect is planning a new nature area in middle of campus. She wants the length to be twice the width, and wants to put a 3foot high retaining wall around the perimeter. There will be 300 total feet wall installed. How wide will this area be?
I think it's α=l*w
But now I'm lost, could someone help me?
Click here to see answer by MathTherapy(10552)  |
Question 1002040: I have a composite shape that forms two squares, the length and the width for both squares is 6 ft. So the area for both squares is 36 ft square. Then I have two rectangles one with a length of 6 feet and a width of 15 all the way down one side. The second rectangle has a length of 9 feet and a width of 12 feet. I thought in order to find the area of a composite figure I add up all the areas. But the book is somehow getting 18 ft as one of the side lengths thus leading to a different answer. How or why is this happening? is it a typing error?
Click here to see answer by addingup(3677)  |
Question 1003791: Bob has designed a square mural that measures 10 feet on each side. Bill has also designed a square mural, but his measures y feet shorter on each side. Write an expression to represent the area of Bill's mural. How much smaller than Bob's mural is Bill's mural? Explain
Click here to see answer by josgarithmetic(39617) |
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