Pre-calculus help?!?!?

Question

okay, the question is. A cylindrical tank is laying horizontally on the ground with a diameter or 14 ft, length of 17ft, and a depth of water inside the tank of 4ft. *1 gallon=231 cubic inches. a) how many gallons of water are in the tank? b)How many more gallons of water will it take to fill the tank?

sorry, i'm absolutely terrible at this. any help would be appreciated!! thanks so much ahead of time!!

Answer 1

volume of cylinder = V = pi * radius * radius * height.

First you calculate the volume of the cylindrical tank.

Then you calculate the volume of the water.  You can think of

the water forming another cylinder with height 4ft.

For a), you have to convert the volume of water from cubic feet into cubic inches.  That means divide by 12^3.  Then calculate gallons.

For b), you have to find how many gallons can fill the tank using the methods from a).  Then subtract that answer by the answer you got from a).