SOLUTION: hi find the volume of a cone thats 9inches high and has a 3inch radius(use3.14) Thank-U

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Question 389159: hi
find the volume of a cone thats 9inches high and has a 3inch radius(use3.14)
Thank-U
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

V=%281%2F3%29%2Api%2Ar%5E2%2Ah Start with the volume of a cone formula.


V=%281%2F3%29%2Api%2A%283%29%5E2%2A%289%29 Plug in r=3 and h=9


V=%281%2F3%29%2A%283.14%29%2A%283%29%5E2%2A%289%29 Replace pi with 3.14 (note: Use more digits of pi to get better accuracy).


V=%281%2F3%29%2A%283.14%29%2A%289%29%2A%289%29 Square 3 to get 9


V=%281%2F3%29%2A%2828.26%29%2A%289%29 Multiply 3.14 and 9 to get 28.26 (this figure is approximate).


V=%281%2F3%29%2A%28254.34%29 Multiply 28.26 and 9 to get 254.34 (again, this is approximate).


V=84.78 Multiply 1%2F3 and 254.34 to get 84.78


So the volume of the cone with radius of 3 inches and height of 9 inches is approximately 84.78 cubic inches.