J.R. S. answered 11/12/17
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Ph.D. in Biochemistry--University Professor--Chemistry Tutor
500 m x 1 km/1000 m x 1 hr/2.5 km = 0.2 hours = 12 minutes
Santosh J.
asked 11/12/17J.R. S. answered 11/12/17
Ph.D. in Biochemistry--University Professor--Chemistry Tutor
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