Assume That the Cities Lie on the Same North-South Line $1035 \mathrm { ft } / \mathrm { min }$

question 26

Multiple Choice

Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km.
-A pulley with a diameter of 28 inches is driven by a belt which is moving $1035 \mathrm { ft } / \mathrm { min }$ . To the nearest unit, how many revolutions per minute are made by the pulley?

• A) \(246 \mathrm { rpm }\)
• B) \(141 \mathrm { rpm }\)
• C) \(239 \mathrm { rpm }\)
• D) \(153 \mathrm { rpm }\)

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