A circular rim 28 inches in diameter rotates the same number of inches per second as a circular rim 35 inches in diameter. If the smaller rim makes x revoluations per second, how many revolutions per minute does the larger rim make in terms of x?
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一个圆形轮子直径28inches, 绕一个同样的旋转速度(the same number of inches per second )的直径35inches的圆轮旋转. 如果小轮x转/秒(revoluations per second), 求大轮每分钟多少转(用X表达)
一个直径为28英寸的圆形外缘与一个直径为35英寸的原形外缘每秒旋转相同能够的英寸数。若较小的一个每秒旋转X次,较大的一个没分钟旋转多少?
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