SOLUTION: find the radius of a right cone to the nearest 10th if the volume is 300cm cubed and the height is 20cm

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Question 762932: find the radius of a right cone to the nearest 10th if the volume is 300cm cubed and the height is 20cm
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

the volume is V=%281%2F3%29pi%2Ar%5E2%2Ah

if the volume is 300cm%5E3 and the height is h=20cm, then

300cm%5E3=%281%2F3%293.14%2Ar%5E2%2A20cm.....solve for r

300cm%5E3=20.933cm%2Ar%5E2

300cm%5E3%2F20.933cm=r%5E2

14.33cm%5E2=r%5E2

sqrt%2814.33cm%5E2%29=r

3.79cm=r