Question: a college has classes from 10 : 00 am until 1 : 40 pm . in this duration , there are 5 periods . if 5 minutes are provided between each period to leave one class and enter the next class , how many minutes long is each period ?
A) 38 min
B) 41 min
C) 40 min
D) 42 min
E) 52 min
Correct answer: c
Grade: 7 | Topic: Expressions and Equations | Difficulty: Medium | Standard: 7.EE.B.3