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Four men are walking in a 10 km walking competition. The winner completes the distance in 5 hours 45 minutes and he reaches 35 minutes before the runner up completes his walk. What was the speed of the runner up in the race? Please explain. Thanks!!!

Tom can complete a work in 10 days, Harry can do it in 7 days, while Paul can do the work in 12 days. Starting the work together, Tom leaves after 2 days. Harry and Paul continue their work, but Paul leaves one day before Harry and Paul could have completed the work together. How much work...