Answer:
Olumide will practice 40 minutes of playing the piano
Explanation:
Olumide practices piano and guitar in the ratio of 5:8
64 minutes of guitar playing means that Olumide has had 8 individual practicing sessions of guitar (64 / 8 = 8), so he has also had 8 practicing sessions of piano.
5 x 8 = 40 minutes of piano practice