SOLUTION: Hey tutors,I needed a little help in surface area. I know how to find surface ares in different shapes.Although,I dont know how to find missing parts of it (Height,Length etc.) so

Question 436024: Hey tutors,I needed a little help in surface area. I know how to find surface ares in different shapes.Although,I dont know how to find missing parts of it (Height,Length etc.) so here it is:
The surface area of a rectangular prism is .The width is 11cm and the length is 20cm.What is the height of the rectangular prism.
What iv'e tried:
formula ....Yea...I'm getting nowhere -_-...Thanks!
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The surface area of a rectangular prism is 812 sq/cm.
The width is 11cm and the length is 20cm.
What is the height of the rectangular prism.
:
the surface area formula
2(L*W) + 2(L*H) + 2(W*H) = S.A.
so we have
2(20*11) + 2(20*H) + 2(11*H) = 812
Simplify, divide by 2
(20*11) + (20*H) + (11*H) = 406
220 + 20H + 11H = 406
31H = 406 - 220
H =
H = 6
:
:
I'll let you check this in the surface area formula

RELATED QUESTIONS
I have to find the volume of a box using the surface area and i dont know... (answered by TimothyLamb)

hey can someone help me on this. i have a heptagon (7 sides) and its telling me to find... (answered by awang1996)

I had a question on my geometry homework, how would you find the surface area of a pool... (answered by Alan3354)

I have a sphere with a diameter of 88,846 miles, and another sphere with a diameter of... (answered by nerdybill)

the sequence 6, 24, 54, 96,... comes from the surface area of cubes. they want me to... (answered by mananth,stanbon)

I'm trying to help my daughter with her science fair project. Her project was to find... (answered by edjones)

HELLO I AM A STUDENT OF CLASS 7TH. I WANT TO KNOW ABOUT THE CONCEPT OF SURFACE AREA OF A (answered by nabla)

I need help finding the surface area of a cylinder. that is 10ft high and 2 ft in... (answered by Alan3354)

A cylindrical post 6.28 in. in diameter is surmounted by a part of a sphere 5.16 in. in... (answered by Solver92311)