Question

A traffic school class has three parts. In the first part, a film is shown that takes one fifth of the class
time. In the second part, the instructor lectures for 70 minutes. In the final part, a test is given that
takes one third of the class time.
The duration of the traffic school class is

Answer 1

Given :   A traffic school class has three parts. In the first part, a film is shown that takes one fifth of the class time. In the second part, the instructor lectures for 70 minutes. In the final part, a test is given that

takes one third of the class time.

To find : The duration of the traffic school class

Solution:

Let say Duration of the traffic School Class = 15T  Minutes

First Part =  one fifth of the class = (1/5) 15T  = 3T  Minutes

Second Part = 70 Minutes

Third Part = one third of the class time = (1/3) 15T = 5T Minutes

Total Time = 3T + 70 + 5T  = 8T + 70 Minutes

8T + 70 + 15T

=> 70 = 7T

=> T = 10

=> 15T  = 150

The duration of the traffic school class is 150  minutes

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