PS DS 83

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83. 7800-!-item-!-187;#058&005796
How much time did it take a certain car to travel 400 kilometers?

(1) The car traveled the first 200 kilometers in 2.5 hours.

(2) If the car's average speed had been 20 kilometers per hour greater than it was, it would have traveled the 400 kilometers in 1 hour less time than it did.

紅色字 it was 是指為何?

ans:B

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thanks everybody~~~


我找到我要的答案嚕~~~