Problema Solution
your teacher spends 1/3 of his waking hours with students. 1/9 of his waking hours visiting facebook. 1/6 of his waking hours preparing lectures. 2 hours grading and 5 hours on other personal item.
how many hours of sleeps does your teacher get?
Answer provided by our tutors
we assume these number refer to one day in the life of the teacher and that a day is 24 hours
we start with 24 hours and then subtract out the activities described above, the remaining time is available for sleep:
24 - 24/3 - 24/9 - 24/6 - 2 - 5 = 2 1/3
1/3 * 60 = 20
the teacher gets 2 hours and 20 minutes of sleep