Mathematics · Speed, Distance and Time
Consider the following statements related to average speed: (P) When a person travels equal distances at different speeds, the average speed is the harmonic mean of the speeds. (Q) Average speed is always the arithmetic mean of the speeds. (R) When a person travels for equal intervals of time at different speeds, the average speed is the arithmetic mean of the speeds. (S) Average speed depends on the total distance travelled and the total time taken. Which of the following is correct?
- 1P and S are true; Q and R are false.
- 2P, R and S are true; Q is false.✓
- 3P and Q are true; R and S are false.
- 4P, R and Q are true; S is false.
Correct answer
P, R and S are true; Q is false.
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