Problema Solution
Jennifer can paddle a certain distance with the current in 2.5 hours. To cover the same distance against the current, she takes 5 hours. How many times faster is her rate of paddling n still water than the speed of the current? Solve using linear combination.
Answer provided by our tutors
The rate of paddling n still water is 3 times than the speed of the current
Solution: set the distance is D, the current speed is C, the speed is S
then (S + C ) x 2.5 = D
(S - C) x 5 = D
S = 3C
so the rate of paddling n still water is 3 times than the speed of the current