a lift has the capacity of 18 adults or 30 children. how many children can board the lift with 12 adults?
Answer:
LCM of 18 and 30=90. Let the capacity of lift be 90x.
Capacity of 1 adult = 90x/18 = 5x
Capacity of 1 child = 90x/30 = 3x
With 12 adults, lift is already occupied with 12 × 5x capacity = 60x capacity.
Capacity = 90x - 60x = 30x,
Number of children that can board = 30x/3x = 10