Question 1064010
1)Let r be Emily's rowing speed; then Ashley's rowing speed is r+1. And let the speed of the current be c. Then:
6/r+c=1  and
6/(r+1)-c=2
So:
r+c=6 and
2r+2-2c=6, or 2r-2c=4
2r+2c=12
2r-2c=4
4r=16
r=4
Emily's rowing speed is 4 mph; the current is 2 mph. And Ashley's rowing speed is 5 mph.
2)Emily's total time:
6/4+2 + 6/4-2=6/6+6/2=4 hours
Ashley's total time:
6/7+6/3=2&6/7 hours
4-2.8571428571428571428571428571429=1.142857 hours that Ashley would finish ahead of Emily. ☺☺☺☺