a class starts at 10 a m and lasts till 1..., Simplification, General Mathematics

Question:A class starts at `10` a.m .and lasts till `1.27`p.m. Four periods are held during this interval .After every period, 5 minits are given free to the students .The exact duration of each period is .

A `42 minutes ` 
B `48 minutes ` 
C `51 minutes ` 
D `53 minutes `

/94

+ AnswerB

+ ExplanationTime between `10` a.m. and `13.27` hours `= 3`hours `27` min.`= 207` min.

For three period in between free time `15 min`

:.Remaining time `= (207 - 15)` min`= 192` min.

Duration of each of the `4` periods `= (192/4)` min.`=48`.

+ Report

Descriptive on Simplification Ebook

Total Preview: 546