Multiple choice

The average weight of $10$ men in a boat is increased by $1.8$ kg, when one of the crew members whose weighed $53$ kg is replaced by a new man. Find the weight of the new man?

  1. $75$ kg
  2. $71$ kg
  3. $68$ kg
  4. $80$ kg
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total weight increase = 10 * 1.8 = 18 kg. New man's weight = 53 + 18 = 71 kg.

AI explanation

The total increase in the weight of the 10 men is calculated by multiplying the number of men by the increase in average, which is 10 times 1.8, giving 18 kg. This means the new man must weigh 18 kg more than the man he replaced, who weighed 53 kg. Therefore, the weight of the new man is 53 plus 18, resulting in 71 kg.