What is the heating capacity, in BTUs, of a cylindrical storage tank of natural gas with a radius of 3 feet and a height of 10 feet? Assume that 1 cubic foot of propane contains 2,516 BTUs and 1 cubic foot of natural gas contains 1,030 BTUs. Use 3.14 for pi, and round your answer to the nearest BTU.

There are several information's already given in the question. Let us write them down first.

Radius of the tank = 3 feet

Height of the tank = 10 feet

Value of pi = 3.14

Then

Volume of the cylindrical tank = 3.14 * (3) ^2 * 10

= 3.14 * 9 * 10

= 282.6 ft^3

Now

Heating capacity of 1 cubic foot of natural gas = 1030 BTU's

Then

Heating capacity of 282.6 cubic foot of natural gas = 1030 * 282.6

= 291078 BTU's

I hope the procedure is clear enough for you to understand.