Diameter=2*radius
10=2*r
r=5
V=pi*(r^2)*h
V=pi*(5^2)*9
V=225pi cm^3
Total amount of instrument players= 300
Number of brass instrument players= x (because we do not know how many there are, except that all other values that we must calculate are based off of the number of brass players we have
Number of string instruments= 3x (because 3 times more than the number of brass instruments
Number of Percussion= x-60 (because there are 60 less percussion players than brass players
So, our equation is (number of string instruments)+(number of brass instruments)+(number of percussion instruments)=300 (which is our total possible number of people
3x+x+x-60=300
3x+x+x=360
5x=360
x= 72
We have 72 brass instrument players, 3(72)= 216 string instrument players, and 72-60=12 percussion players
check: 72+216+12=300
