prize17-8, Exercise 3: Length of a 32-bar chorus

bars = 32
for bpm in (120, 136, 150):
    seconds = bars * 4 * 60 / bpm
    print(bpm, "bpm:", round(seconds, 1), "s per chorus,", round(seconds / 60, 2), "min")

Output (run and checked):

120 bpm: 64.0 s per chorus, 1.07 min
136 bpm: 56.5 s per chorus, 0.94 min
150 bpm: 51.2 s per chorus, 0.85 min

Why it works: 32 bars of four beats make 128 beats, and each beat lasts 60 / bpm seconds.

Care: these tempos are examples, not measurements of the album. The real tempo of any recording should be checked against a source.