Question

21. A lift has the capacity of 18 adults or
30 children. How many children can
board the lift with 12 adults?
(a) 6
LOTTO
(c) 12
(d) 15
with solution ​

Answer 1

Answer:

10 children can board the lift

Let the capacity of lift be 90x (LCM of 18 and 30).

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.

Remaining capacity = 90x - 60x = 30x

Number of children that can board = 30x/3x = 10

Is it correct

Answer 2

Answer:

20

Step-by-step explanation:

bhayya

18A-30C

then12A-?C

let?=x

18X=12×30

X=12×30/18=20

..............