Exam Time | Letter Writing Part 1

Write the reflexes that use maximum in time of exam from starting to end of a student.

Find the number of arrangements of the letters of the EXAM

A certain exam lasts a total of 4 hours. Each part of the exam required the same amount of time and 10 minute brekas are included between consecutive parts. If there is a total of 4 breaks during the 4 hours, what is the required time, in minutes, for each part of the test?