The washing machine drum washes at 71 RPM. The washing machine motor pulley has a diameter of 8 cm. What must be the diameter of the drum machine pulley when the motor is at 351 RPM?

Correct answer:

D =  39.5 cm

Step-by-step explanation:

n1=71 n2=351 d=8 cm  s1=s2 n1 D=n2 D D=n2n1 d=35171 8=280871 cm=39.5 cm

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