Multiple choice

A boat goes downstream at a speed of 40 km/hr and comes back the same distance at 24 km/hr. Find the average speed in km/hr for total journey ?

  1. 32

  2. 30

  3. 31

  4. 33
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For equal distances, average speed = 2 × downstream × upstream ÷ (downstream + upstream) = 2 × 40 × 24 ÷ (40 + 24) = 1920 ÷ 64 = 30 km/hr. Option B is correct.

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