You have to turn them in to the lowest common denominator
Answer:
Widget per hours for A: 5
Widgets per hour for B: 8
Widgets per hour for C: 6
Widget B is the fastest
Step-by-step explanation:
A: 30 /6 = 5
B: 64/8 = 8
C: 18/3 = 6
C = d × pi
C = 6 × 3.14
C = 18.84