A certain barrel, which is a right circular cylinder, is filled to capacity with 60 gallons of oil. The first barrel is poured into a second barrel, also a right circular cylinder, which is empty. The second barrel is twice as tall as the first barrel and has twice the diameter of the first barrel. If all of the oil in the first barrel is poured into the second barrel, how much empty capacity, in gallons, is left in the second barrel?
Choose the correct choice from the following answers.
A) There is no empty capacity B) 100 gallons C) 300 gallons D) 420 gallons E) 840 gallons
Radius of first cylinder=r, diameter=2r, height=h   Radius of second cylinder=2r, diamter=2d and height=2h   Volume of first cylinder=pie (r^2)*h=60   Volume of second cylinder=pie(2r^2)2h   Put the value of pie (r^2)*h=60 in the second cylinder,volume= pie (r^2)*4*2=60*8= 
<gadget id="calculator">60*8</gadget>
<output>480</output>
480 gallons   Empty capacity=420 gallons   Answer 420 gallons
<result>D</result>
A certain barrel, which is a right circular cylinder, is filled to capacity with 60 gallons of oil. The first barrel is poured into a second barrel, also a right circular cylinder, which is empty. The second barrel is twice as tall as the first barrel and has twice the diameter of the first barrel. If all of the oil in the first barrel is poured into the second barrel, how much empty capacity, in gallons, is left in the second barrel?