It will take 6 hours for machine A to finish a task. If machine A and machine B work at the same time, can they finish the same task in 3 hours?
1: Machine B is twice as efficient as machine A.
2: The efficiency of machine B is higher than that of machine A.
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AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
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BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
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CBoth statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
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DEACH statement ALONE is sufficient.
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EStatements (1) and (2) TOGETHER are NOT sufficient.
显示答案
正确答案: D