A spherical gas tank has a 10 foot diameter when filled with propane it provides 358,000,000 BTUs how many BTUs does 1 cubic foot of propane yield? Round to the nearest thousand

Volume of the spherical tank will be given by:

V=4/3πr³

thus the volume of the tank will be:

V=4/3*π * (10/2) ³=523.59877756~523.6 ft³

Given that 523.6 ft³ can hold 358,000,000 BTUs of propane, the amount that 1 ft³ will be given by:

[total amount]/[total volume]

=358,000,000/523.6

=683,728.0367 BTUs/ft³

=684,000 BTUs/ft³ (in thousand)