Problema Solution
The capacity of an elevator is either 20 children or 15 adults. If 12 children are currently in the elevator, how many adults can still get in?
Answer provided by our tutors
let
c = the weight of 1 child
a = the weight of 1 adult
20c = 15a divide both sides by 5
4c = 3a
if there are 12 children in the elevator another 8 children can get in
since 8c = 2*(4c) = 2*3a = 6a
another 6 adults can get into the elevator.