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In the table, a boat's still-water speed and the stream speed are given for four trips. On which trip is the upstream speed the lowest?

Competition practiceBoats & Streams
  • ATrip 3
  • BTrip 1
  • CTrip 2
  • DTrip 4

Step-by-Step Solution

Upstream = boat − stream: Trip 1: 10, Trip 2: 9, Trip 3: 7, Trip 4: 11 km/h. Lowest is Trip 3.
Answer: A) Trip 3

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