Math problems

If Slowlane leaves the house at 7:25 it takes 40 minutes to get to work, if she leaves at 7:15, it takes 35 minutes, if she leaves at 7:10 it takes 30 minutes.

How early must she leave for it to take no time at all?

Comments

Brian said…
That answer is easy. She must spend the night sleeping at her desk.

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