when rounded the answer would be 20cu. inches The formula for finding the volume of a cone is 1/3(hπr^2) since we don't know the radius we can find it out through the equation of finding the circumference which is π x d =9.8inches so the diameter is 9.8/π which is 3.119437 inches since the diameter is 2xradius so it would be 3.119437/2=1.559718 so now we can plug this into our equation
1/3(6.7x3.141592653x1.559718^2) so that would be 17.06851cu.inches
Call red as X then X/Green =5/16 => green = 16X/5. six times the number of reds exceeded the number of green by 112 => 6X-16X/5=112 => 14X/5=112 => X= 40 => reds:40 => green = 128