It's about 3 1/2 hours.
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Really? I'd like to see you walk 200 miles in 31/2 hours! The proper answer is that it depends on the speed at which you travel.
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hours are time, and miles are length
That's about 67 hours.
distance is speed x time; (2 x 40) + (2 x 60 ) = 200 miles
The time taken will depend on how fast you can cycle.
Six more hours.