Question 402406
D=RT
D=60*5=300 K. IS THE DISTANCE
300/3=100 K/H IS THE SPEED ON THE RETURN TRIP.
(100+60)/2=40/2=20 K/H IS THE DIFFERENCE IN (CURRENT SPEED.
PROOF:
100-20=80 K/H FOR THE BOAT
60+20=80 DITTO