A class starts at 10: 00 am lasts till 1 : 27 pm. Fourperiods are held

1.	A class starts at 10: 00 am lasts till 1 : 27 pm. Fourperiods are held during this interval. After everyperiod, 5 min rest are given to the students. The exactduration of each period is(a) 40 min(c) 51 min[RPSC 2013](b) 48 min(d) 53 min
Answer» Total time between 10:00 am to 1:27 pm = 3 hrs 27 min= 3*60 + 27= 180 + 27= 207 minutes Now let duration of each period be x Then,4x + 15 = 2074x = 207 - 15 = 192x = 192/4 = 48 Therefore duration of each period is 48 minutes (b) is correct option

A class starts at 10: 00 am lasts till 1 : 27 pm. Fourperiods are held during this interval. After everyperiod, 5 min rest are given to the students. The exactduration of each period is(a) 40 min(c) 51 min[RPSC 2013](b) 48 min(d) 53 min

Answer»

Total time between 10:00 am to 1:27 pm = 3 hrs 27 min= 3*60 + 27= 180 + 27= 207 minutes

Now let duration of each period be x

Then,4x + 15 = 2074x = 207 - 15 = 192x = 192/4 = 48

Therefore duration of each period is 48 minutes

(b) is correct option