Question 12
Two boats travel between points A and B on the same river.
• Boat 1 takes 90 hours downstream from A to B and 210 hours upstream from B to A.
• Boat 2 takes 35 hours downstream from A to B and 45 hours upstream from B to A.
What is the ratio of boat 1’s speed in still water to boat 2’s speed in still water?
Practice convention: the river current is constant, and each boat keeps a constant speed relative to the water on both journeys.
• Boat 1 takes 90 hours downstream from A to B and 210 hours upstream from B to A.
• Boat 2 takes 35 hours downstream from A to B and 45 hours upstream from B to A.
What is the ratio of boat 1’s speed in still water to boat 2’s speed in still water?
Practice convention: the river current is constant, and each boat keeps a constant speed relative to the water on both journeys.