It takes 4 minutes to play a song at 40 beats per minute. If the tempo is slowed down to 30 beats per minute, how long does it take to play the song?

Question

multiply minutes by beats per minute

Answer 1

The total number of beats in the song are determined by the length of the song and the tempo. If the tempo is slowed down, the song will play longer.

Beats = tempo (times) time

Beats = 40 (b.p.m.) times 4 (min)

         = 160 beats.

Now, we will use the adjusted tempo:

Beats = tempo (times) time

160   = 30 (b.p.m.) times t (min)

t = 160 / 30

t = 5 1/3 minutes.

 

The song will last 5 1/3 min with tempo of 30 (b.p.m.).