GWD4-28

mayce · 发表于 2006-8-9 16:27:00

Q28:

A car traveling at a certain constant speed takes 2 seconds longer to travel 1 kilometer than it would take to travel 1 kilometer at 75 kilometers per hour. At what speed, in kilometers per hour, is the car traveling?

A. 71.5

B. 72

C. 72.5

D. 73

E. 73.5

答案为B

mymengming · 发表于 2006-8-9 17:47:00

答案是对的

你可能计算错误了

mayce · 发表于 2006-8-10 10:38:00

具体怎么算啊？

mayce · 发表于 2006-8-11 18:14:00

up!没人理啊？

端木晴 · 发表于 2006-8-11 19:02:00

1/75+2/3600=1/x
x=72

GWD4-28

GWD4-28

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