Problema Solution
If you play a song at 118 beats per minute, it takes 4 minutes, 35 seconds to play. If you slow the tempo down to 100 beats per minute, how long does it take to play this song? Answer in terms of minutes and seconds, rounding to the nearest second.
Answer provided by our tutors
One way would be to figure out the total number of beats and then divide by the rate of 100 beats per minute to get the time in minutes.
118 beats x 4 minutes + 118 x (35/60) minutes =
= 472 + 68.83333 =
= 540.8333 beats
Dividing by 100 beats per minute, we get:
540.8333/100 = 5.408333 minutes
0.408333 * 60 ≈ 24.5 seconds
Rounding up, we have 5 minutes 25 seconds.