Volume of a cylinder
Use V = πr²h for a cylinder with radius 3 and height 10.
A cylinder's volume is the area of the circular base times the height: V = π × r² × h. With r = 3 and h = 10, V = 90π, about 282.74.
Classic Graphing 84
Start on the main screen: Press 2nd then mode (QUIT) to get back to the home screen. Pressing clear on a menu also backs out of it.
Press 2nd and ^ for π. Multiply by 3 squared, then by 10.
2ndπ^×3x²×10Press enter.
enter
You should seeπ*3²*10 282.7433388
Natural Scientific 991
Start on the main screen: Press MENU, then 1 (Calculate) to return to the main calculation screen. AC clears the line you are on.
Press SHIFT and ×10ˣ for π. Multiply by 3 squared, then by 10, and press =.
SHIFTπ×10ˣ×3x²×10=Press S⇔D to see the decimal.
S⇔D
You should see282.7433388
RPN Scientific 15
Start on the main screen: There is no menu to leave. Press the back arrow to clear a number you are typing, or CLx (g then back arrow) to clear the X register.
Key in 3 and square it with g then x².
3gx²√xKey in 10 and multiply. Then press g π and multiply again.
10×gπEEX×
You should see282.7433
Tips
- Radius and height must use the same unit. The answer is in that unit cubed (cm³, for example).