5. Nancy rowed across the lake with her friend Kelly at a rate of 3 mph. Kelly then rowed back at a rate of 2 mph. If the lake is 6 miles across, how long did it take them to complete their trip?

A. 5 hours
B. 5/6 hours
C. 4 hours
D. 1 hour

Question

5. Nancy rowed across the lake with her friend Kelly at a rate of 3 mph. Kelly then rowed back at a rate of 2 mph. If the lake is 6 miles across, how long did it take them to complete their trip?


A. 5 hours
B. 5/6 hours
C. 4 hours
D. 1 hour

anonymous · Answer

if the lake is 6 miles across and nancy rowed at 3mph, that would mean nancy did the first trip in 2 hours. If kelly rowed at 2mph, then kelly did the trip in 3 hours. So the answer would be 5 hours. 

6miles/3mph = 2hours
6miles/2mph= 3hours