Question

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.

Answer 1

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.