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At the same time, Jim and Tony biked from home to their school. If their respective speed in the whole trip are constant, how much time earlier will Jim arrive than Tony?
1) The distance between home and school is 200 miles 2) Jim bikes 10 miles per hour faster than Tony
E simple reasoning 1)insuf cause we don't know distance between (which )home and school is 200 miles 2) Jim bikes 10 miles per hour faster than Tony[/quote]Insuff cause we don't know whats Tony's speed