5 times 168 = 840
V = 840 ft ^ 3
8 times 5 = 40
40 times 6 = 240
168 times 2 + 240 = 576
Sa = 576 sqft ^2
Bob
ps. If you post what you have worked out, I'll check them for you.
]]>Thanks. I've got the image of the cone/cylinder/hemisphere and I can show you how to calculate that. I'm not getting the other image.
Here's the formulas you need:
cone:
h is given as 8; the radius is the same for all three parts: 10/2 = 5
s is the length of the sloping edge. You'll have to use Pythagoras for that:
cylinder:
h' is what's left after you've taken off 8 and 5 from 25.
hemisphere:
If you had been asked for the surface area of each part then you'd need to include the base(s) but, as they are joined, this shouldn't be needed.
Bob
]]>https://imgur.com/JnunUwZ
]]>Don't know if the last link worked?
]]>img-2-L24_N6.jpg
2. Construct a prism from the above regular hexagon. The height of the hexagonal prism is 5 feet. Find the surface area and the volume of this prism.
Measurements from my last problem: 360/6=60 degrees, 180-60=120/2= Side angle of 60. Tan(60)=h/8/2=4, 4*tan(60)=6.928 for the height. A= 1/2(8)(6.928), A= 27.712. Entire Area= 27.712(6)= 166.3 sq ft.
Welcome to the forum.
You've not given us any diagrams or measurements so it's hard to be more helpful. Have a look at these pages and post again if you're still stuck.
https://www.mathsisfun.com/geometry/con … inder.html
That site has a good search facility so you can find prims too.
Bob
]]>Um, someone explain?
2. Construct a prism from the above regular hexagon. The height of the hexagonal prism is 5 feet. Find the surface area and the volume of this prism.
Not too confident about this one either.
]]>