Toloong… Pat and Joe have volunteered to help the kindergarten teacher get her class ready before school starts. One of the tasks they have to do is sorting out all the crayons into color groups. Pat can sort 950 crayons in an hour. Joe can sort 900 crayons in three hours. At that rate how long will it take them to sort 8000 crayons?

1

Jawapan

2016-06-25T00:21:03+08:00
Pat= 950 per hour
john = 900 per three hours
        = 300 per hour
950+350=1250 per hour
8000 divided by 1250 = 6 point 4 hours
                                   = 6 hours 24 minutes#