The following are the data for two crossed helical gears used for speed reduction: Gear I : Pitch circle diameter in the plane of rotation 80 mm and helix angle 300 Gear I : Pitch circle diameter in the plane of rotation 120 mm and helix angle 22.50 If the input speed is 1440 rpm, the output speed in rpm is
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$N_2 = 899.88 \backsimeq 900 rpm$