I hate working out, so I prefer to stroll leisurely to get my exercise. I stroll along at 2 km/h. One of my jogging friends told me that I would save time if I jogged even though I covered the same distance of 12 kilometers. He suggested I jog along with his next time he went. Now he can cover ground three times as fast as I stroll, so exactly how much time would I save if I jogged?
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