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 tobe the same?
A school has 8 periods a day each of 45 minutes duration.
Total time = 8 × 45 minutes
if the school has 9 periods a day.
Then duration of period = (8 × 45)/ 9
= 40 minutes