Problema Solution
Some family friends have asked you to plan a rafting expedition. A rafting company has agreed to take your group down the Babbling River.
The rafting company has given you specific details on how much weight a raft can hold.
A raft can safely carry the weight of 24 babies.
As everyone knows, the weight of 12 babies is exactly equal to the weight of 4 teenagers; the weight of 6 teenagers is exactly equal to the weight of 3 adults. Figure out the least number of rafts that is needed for a trip with 11 adults, 5 teenagers, and 21 babies. (Supervision of the babies is not necessary.)
Answer provided by our tutors
12 babies is exactly equal to the weight of 4 teenagers means that 1 teenagers is the weight of 12/4 = 3 babies.
The weight of 6 teenagers is exactly equal to the weight of 3 adults means that 1 adult weights as much as 6/3 = 2 teenagers.
1 adult = 2 teenagers
1 teenager = 3 babies
1 adult = 2*3 = 6 babies
11 adults + 5 teenagers + 21 babies = 11*6 + 5*3 + 21 = 102 babies
102 = 4*24 + 6 means that we will need at least 5 rafts.