A car passes through three points A, B and C on a road, successively. The average speed of a driver driving through AC was 20 feet/second. What's the average speed he drove through section BC?
(1)The average speed he drives through section AB was 10 feet/second.
(2)It took him 20 seconds to drive through section BC.
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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: E