SOMEONE HELP!
A construction company was contracted to build a cylindrical storage tank with a diameter of 60 feet and height of 16 feet. Just before construction was to begin, it was learned that a new law allows tanks to be a maximum of 9 feet in height.
If the tank is redesigned to meet the law, but has the same volume, what is its new diameter?

Question

SOMEONE HELP! 
A construction company was contracted to build a cylindrical storage tank with a diameter of 60 feet and height of 16 feet.  Just before construction was to begin, it was learned that a new law allows tanks to be a maximum of 9 feet in height.
If the tank is redesigned to meet the law, but has the same volume, what is its new diameter?

anonymous · Answer

Here are the choices but how do I solve this?!
A.) 106 feet, 8 inches
B.) 80 feet
C.) 40 feet
D.) 53 feet, 4 inches