Multiple choice

Two boats A (in the direction of current) and B (in the opposite direction of the current) begin to move towards each other from point P and Q respectively, and after 1 hour when they meet, the distance covered by boat A is 300% more than the distance covered by boat B. If boat A moves in the opposite direction of stream and Boat B moves in the direction of the current, then by what percentage the distance covered by boat A will be more / less than the distance covered by boat B in 1 hour.

  1. No change

  2. 100% less

  3. 200% more

  4. 300% less
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When boats switch directions, their effective speeds swap: A now goes against current (v_A - c) while B goes with current (v_B + c). The key insight is that the distance ratio remains 4:1 regardless of which direction each boat travels, because the speed difference is symmetric. Therefore, A still covers 300% more distance than B, so there is no change.

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