17 numbers of rafts are required.
Explanation:
There are 136 people waiting for a river raft ride each raft holds 8 people.
Number of people = 136
Capacity of raft = 8 people
We need to find number of rafts required.
We have
Number of people = Number of rafts required x Capacity of raft
136 = Number of rafts required x 8
Number of rafts required = 17
17 numbers of rafts are required.