Two pulleys are connected by a belt. The sum of the diameter of two pulleys is 90 cm and while one makes 50 rpm, the other makes 20 rpm. What will be the diameters of the other pulley? - PrepBharat

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Two pulleys are connected by a belt. The sum of the diameter of two pulleys is 90 cm and while one makes 50 rpm, the other makes 20 rpm. What will be the diameters of the other pulley?

a) 14.1234 cm, 21.9876 cm
b) 34.357 cm, 24.0473 cm
c) 18.426 cm, 15.921 cm
d) 64.2857 cm, 25.7142 cm

Answer: d
Explanation: D1 + D2 = 90 cm
\(\frac{D1}{D2}=\frac{50}{20}\) = 2.5
3.5 D2 = 90
D2 = 25.7142 cm
D1 = 64.2857 cm

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