Jason and Gui Li started from school to the library at the same time, but the speed remained the same. Do you know how far it is from school to the library?

780 meters.

Let the total distance be s.

Jason walked halfway and Gui Li walked two-fifths of the way. Because when Jason walked to the library, Gui Li still had one-fifth of the way to go, which means she had already walked four-fifths of the way. So when Jason walked halfway, she walked two-fifths of the way. The remaining three-fifths of the road has not yet been taken. So 3/5 * S = 468. S = 780。

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