Answer:
It is given that the volume of a cone =
cubic units
Volume of cone with radius 'r' and height 'h' = 
Equating the given volumes, we get

× 

It is given that the height is 'x' units.
Therefore, 

Therefore, 
So, the expression '
' represents the radius of the cone's base in units.
720 divided by 8 and then look up the answer to that as a fraction on Google
Since 5 + 9 is 14 you can use ANY expression that has the same final value/ sum