Question 1014148
5/8 mile in 1/4 hour is 4 * (5/8)=2.5 mph
3/4 mile in 1/3 hour is 3 x(3/4) mph or 2.25 mph.
2/3 mile in 1/6 hour is 6 x(2/3) mph or 4 mph.  Kayak is fastest.