5.6 rev x 2pi rad/rev / (8 sec) * 60 sec / 1 min = 5.6 * 2pi * 60 / ( 80) R / min = .........
5.6 rev x 2pi rad/rev / (8 sec) * 60 sec / 1 min = 5.6 * 2pi * 60 / ( 80) R / min = .........