Tutors Answer Your Questions about Surface-area (FREE)
Question 1181041: Okay, so I'm really struggling on this question, and I was wondering if someone could tell me what I'm doing wrong.
Ralph is painting the barn below, including the sides and roof. He wants to know how much paint to purchase.
The picture is in the link below:
https://founders.edtell.com/access/content/group/edtell_content_geometry/General%20Prisms.png
a. What is the total surface area that he is going to be painting? Round your answer to the nearest hundredth.
b. If one paint can covers 57 square feet, how many paint cans should he purchase?
c. If each paint can costs $23.50, how much will the paint cost?
d. Once the barn is finished being painted, there is going to be a party. Ralph wants to know how many people to invite to the party. What is the volume of the inside of the barn?
Here is the work I've done. I was told that it's incorrect. I looked back over it a couple of times, but I couldn't figure out where I went wrong. Can somebody please help me?
A.)
45x15x2=1350
20x15x2= 600
40x45x2= 3600
20x4= 80
1350+600+3600+80= 5630 ft
B.)
5630/57=98.77
98.77~99 cans
C.)
99x23.5=2326.5
2326.5= $2,326.50
D.)
45x20x15=19575
(1/2)x80x40x4=6400
19575+6400=25975 ft^3
Click here to see answer by MathLover1(20849)   |
Question 1181041: Okay, so I'm really struggling on this question, and I was wondering if someone could tell me what I'm doing wrong.
Ralph is painting the barn below, including the sides and roof. He wants to know how much paint to purchase.
The picture is in the link below:
https://founders.edtell.com/access/content/group/edtell_content_geometry/General%20Prisms.png
a. What is the total surface area that he is going to be painting? Round your answer to the nearest hundredth.
b. If one paint can covers 57 square feet, how many paint cans should he purchase?
c. If each paint can costs $23.50, how much will the paint cost?
d. Once the barn is finished being painted, there is going to be a party. Ralph wants to know how many people to invite to the party. What is the volume of the inside of the barn?
Here is the work I've done. I was told that it's incorrect. I looked back over it a couple of times, but I couldn't figure out where I went wrong. Can somebody please help me?
A.)
45x15x2=1350
20x15x2= 600
40x45x2= 3600
20x4= 80
1350+600+3600+80= 5630 ft
B.)
5630/57=98.77
98.77~99 cans
C.)
99x23.5=2326.5
2326.5= $2,326.50
D.)
45x20x15=19575
(1/2)x80x40x4=6400
19575+6400=25975 ft^3
Click here to see answer by ikleyn(52781)  |
Question 1181148: I need help whenever possible please
Find the surface area of a cylinder with a base diameter of 12cm and a height of 7cm
.
Write your answer in terms of pi, and be sure to include the correct unit.
(graph for question)
https://imgur.com/a/qwepcS9
Click here to see answer by josgarithmetic(39617) |
Question 1181265: I apologize for posting this question twice, but when I got the automated email there must've been some sort of glitch because there was no link to the tutor's answer. :(
Graph for question: https://imgur.com/a/qwepcS9
Find the surface area of a cylinder with a base diameter of 12cm and a height of 7cm.
Write your answer in terms of , and be sure to include the correct unit.
Click here to see answer by josgarithmetic(39617) |
Question 1181782: Please help:
A triangle is placed in a semicircle with a radius of 9ft, as shown below. Find the area of the shaded region.
Use the value 3.14 for pi, and do not round your answer. Be sure to include the correct unit in your answer.
graph:
https://imgur.com/a/sD8ymWL
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 1181586: A candy company has decided to sell candy in a new package that is shaped like a triangular prism. In order to calculate the volume of the package, the area of the base must be determined.
If the base of the package is an equilateral triangle with sides 10 centimeters (cm) long, what is the area of the base?
Click here to see answer by Boreal(15235)  |
Question 1182637: A rectangular lot 80 m x 40 m long is divided into two
areas by an arc whose center is at the mid-point of the
shorter side. If the radius of the arc is 30 m, what is the
ratio of the area of the smaller part to the area of the
bigger part?
Click here to see answer by greenestamps(13200)  |
Question 1183623: A can in the shape of a right circular cylinder has a paper label covering all of the can except the circular top and the circular bottom. If the radius of the top of the can is about 1.6 inches and the height of the can is 4 inches, which of the following best approximates the area, in square inches, of the part of the can covered by the label?
A. 20
B. 32
C. 40
D. 127
Click here to see answer by MathLover1(20849) |
Question 1183646: Consider the ellipse x^2/9 + y^2/4 = 1 in the first quadrant.
Lines passing through the point (3/2, 1/4), which is inside this quarter-ellipse,
are free to pivot around it inside this region up to the y- and x-intercepts (0,2) and (3,0), respectively.
What is the maximum or minimum area of the region that can be enclosed by the ellipse x^2/9 + y^2/4 = 1,
any of the pivoting lines around the point (3/2, 1/4), and the x or y axis?
Thank you in advance.
Click here to see answer by Solver92311(821)  |
Question 1183685: Consider the quarter-ellipse x^2/9 + y^2/4 = 1 at the 1st quadrant. Two points (0,1/2) and (2,0) are fixed on the y- and x-axes, respectively.
A third point (x,y) is allowed to move along the quarter-ellipse, forming a triangle with the two other given points. Determine the coordinates of the point (x,y) on the curve which will give the triangle with
(i) The optimal area;
(ii) The optimal perimeter.
Click here to see answer by Alan3354(69443)  |
Question 1183685: Consider the quarter-ellipse x^2/9 + y^2/4 = 1 at the 1st quadrant. Two points (0,1/2) and (2,0) are fixed on the y- and x-axes, respectively.
A third point (x,y) is allowed to move along the quarter-ellipse, forming a triangle with the two other given points. Determine the coordinates of the point (x,y) on the curve which will give the triangle with
(i) The optimal area;
(ii) The optimal perimeter.
Click here to see answer by robertb(5830)  |
Question 1183685: Consider the quarter-ellipse x^2/9 + y^2/4 = 1 at the 1st quadrant. Two points (0,1/2) and (2,0) are fixed on the y- and x-axes, respectively.
A third point (x,y) is allowed to move along the quarter-ellipse, forming a triangle with the two other given points. Determine the coordinates of the point (x,y) on the curve which will give the triangle with
(i) The optimal area;
(ii) The optimal perimeter.
Click here to see answer by ikleyn(52781) |
Question 1183915: Find the area of the polygon with the vertices P(-5,4), Q(2,4) and S(1,-1)
Express your answer in the simplest radical form
Please note : Student is only permitted to use formula Area= 1/2 bh
Cannot use this formula Area = 1/2[x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2)]
Click here to see answer by greenestamps(13200) |
Question 1184317: 1. A liquid is sold in plastic bottles of two sizes. The two bottles are exactly similar in
shape. The heights are 13 cm and 39 cm.
(a) Find the ratio in the form
1: n
of the areas of the plastic used to make the two
bottles. [3]
(b) The smaller bottle holds 250ml. Calculate the volume that the larger bottle holds.
[3]
(c) Define congruency and give a clear, practical example. [4]
Click here to see answer by ikleyn(52781) |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840
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