Math help!!!!

[laushik]

Someone please find the total surface area of the overlapping cylinder and prism

[redteam4ever]

Since I see that you probably just want to verify your result, here it is:

We can ignore the top and bottom of the cylinder since the cylinder's top area is replacing missing area on the prism, so we just compute the surface of the prism (640cm²) and add area of the cylinder's wall (and that's basically the area of rectangle where one side is circumference of the cylinder and the other side is its width - 31.4cm²).

 

TL;DR: The surface area of that object is 671.4cm².

 

 

Edited September 8, 2017 by redteam4ever
Math in English is hard :D

[laushik]

1 minute ago, redteam4ever said:

Since I see that you probably just want to verify your result, here it is:

We can ignore the top and bottom of the cylinder since it's the part of the structure, so we just compute the surface of the prism (640cm²) and add area of the cylinder's wall (and that's basically the area of rectangle where one side is circumference of the cylinder and the other side is its width - 31.4cm²).

 

TL;DR: The surface area of that object is 671.4cm².

 

 

Thanks a lot for verifying! That's so strange... why did my teacher take off .5 marks?

[redteam4ever]

8 minutes ago, laushik said:

Thanks a lot for verifying! That's so strange... why did my teacher take off .5 marks?

Well, I can't see the whole thing but when I was doing this stuff, we were required to write a formula we used, units during all the steps and use a scientific notation with one sentence on the end that includes the final result. I don't know what requirements your teacher have, but it might be something from my list.

 

EDIT: Actually, the best way to find out is asking them... And, BTW, you have a typo in your signature, check the spelling of your mouse.