## anonymous one year ago A cylinder has a radius of 12 cm and a height of 10 cm. What is its volume? Select one: a. 240pi cm^3 b. 1200pi cm^3 c. 1440pi cm^3 d. 2400pi cm^3 I got 4000 and something so im lost

1. MrNood

what is the area of one end of the cylinder? (leave pi in the answer...)

2. calculusxy

$\huge B \times h$ B means the area of the base.. in other words out formula is like: $\huge (\pi r^2) \times h$

3. MrNood

@Legendary maybe you have got the answer right - but if you look at the answers they have left pi in the answer have you maybe multiplied pi * r^2 * h (that would give 4000 something...)

4. anonymous

i got 4,523

5. anonymous

i dont get it

6. MrNood

read my post - your answer IS correct - but the answer given has pi left as pi - not multiplied out by 3.14...

7. anonymous

okay so what do i do

8. calculusxy

we are doing it in terms of pi. in other words, we will work with the radius and the height in the formula, but not the pi. r^2 = 12^2 = 144 height = 10 144 x 10 = 1,440 and we will attach pi to 1440 $\large 1,440\pi$

9. anonymous

thank you guys