Our designer wants you to be able to fly around for 120 seconds before running out of fuel.
I will adjust burn rate, so our equation is: 0 = 100 – (b * 120) solving for B
-100 = -(b*120)
100 = b*120
100/120 = b
b = .833
Now, adjusting max fuel, equation is 0 = m – (2*120)
0 = m-240
m = 240