Question 2
Which of the following does not express a time interval?
(a) A day
(b) A second
(c) A school period
(d) Time of the first bell in the school
In a school, there are two bells, one in the primary school and the other in the secondary school. Both the bells ring after every class. The primary school has classes 45 minutes each whereas the secondary school has classes every 1 hour. Find when both the bells ring at the same time again if both classes start at the same time?
A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be the same ?