MEDAL & FAN ANYBODY ?
Calculate the volume of the composite figure.
A. 97pi in.3
B. 108pi in.3
C. 117pi in.3
D. 124pi in.3

Question

MEDAL & FAN ANYBODY ?
Calculate the volume of the composite figure.
A. 97pi in.3
B. 108pi in.3
C. 117pi in.3
D. 124pi in.3

anonymous · Answer

attachment

anonymous · Answer

@sleepyjess

sleepyjess · Answer

lets find the volume of the cone first $\pi r^2\dfrac{h}{3}$  r is 3 h is 9

anonymous · Answer

@sleepyjess that is 84.78

gorv · Answer

ok first divide it in two part

sleepyjess · Answer

oh it looks like they want is to leave it in terms of pi by looking at the answers

gorv · Answer

one is cone and other in cylinder

sleepyjess · Answer

the the first one would be 27$\pi$ actually

gorv · Answer

how do u calculate the volume of cone ??

sleepyjess · Answer

volume of a cylinder is $\pi r^2h$

anonymous · Answer

@sleepyjess so i was wrong ?

gorv · Answer

and cone??

sleepyjess · Answer

no you were right you just went 1 step further than they wanted

anonymous · Answer

@sleepyjess so after the 1st step , whats the next ?

sleepyjess · Answer

did you see the formula i gave you for cylinder?

anonymous · Answer

@sleepyjess no i didnt

sleepyjess · Answer

$\pi r^2h$

sleepyjess · Answer

we already know that r=3 from the cone and they tell us that the height is 10

anonymous · Answer

that would be 282.6

sleepyjess · Answer

dont multiply by $\pi$ just 10*9
which leave 90$\pi$ 
then add 90$\pi$ and 27$\pi$ and you have your answer

anonymous · Answer

i see . thanks @sleepyjess