Multiple choice

The average weight of 5 persons sitting in a boat is 38 kg. The average weight of the boat and the persons sitting in a boat is 52 kg. What is the weight of the boat?

  1. $228 kg.$
  2. $122 kg.$
  3. $232 kg.$
  4. $242 kg.$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total weight of 5 persons = 5 × 38 = 190 kg. Total weight of boat + 5 persons = 6 × 52 = 312 kg (since boat + 5 persons = 6 entities). Therefore, boat weight = 312 - 190 = 122 kg. Option A (228 kg) would be the result of incorrectly adding instead of subtracting. Options C and D are calculation errors.