Correct Option (B)
The lift's capacity is equivalent to 18 adults or 30 children. This establishes a conversion ratio between adults and children for the lift's capacity.
The capacity equivalent of one adult can be determined as follows:
- 18 adults = 30 children
- 1 adult = 1830 children = 35 children
If 12 adults have already boarded the lift, the remaining capacity in terms of adults is:
- Remaining capacity = Total adult capacity - Adults already boarded
- Remaining capacity = 18 adults - 12 adults = 6 adults
To find out how many children can board with this remaining capacity, convert the 6 adults into their child equivalent:
- Number of children = 6 adults × 35 children/adult = 10 children
Therefore, 10 children can board the lift with 12 adults.
Incorrect Options:
The other options are incorrect as they do not align with the established capacity ratio and the calculation of remaining capacity.
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Option A (6): This number represents the remaining adult capacity, not the equivalent number of children.
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Option C (12): This is the number of adults already in the lift, not the number of children that can additionally board.
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Option D (15): This value does not correspond to the correct conversion of the remaining adult capacity (6 adults) into children based on the given lift capacity.