A tunnel elevator can carry a maximum of 15 passengers with an average weight of 81 kg. However, four people beyond the maximum capacity entered the elevator, resulting in an average weight of 82 kg and causing it to be overloaded. Find the average weight (in kg) of the additional four persons.
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Correct answer: D
Explanation
The correct answer is Option 4 i.e. 85.75.
Maximum capacity = 15 × 81 = 1215 kg
New total = 19 × 82 = 1558 kg
Extra weight = 1558 – 1215 = 343 kg
Average weight of 4 extra people = = 85.75 kg