Question

A teacher takes 4 periods in a day the duration of each period is 5 upon 12 what is the duration of 4 periods​

Answer 1

no . of period teacher takes=4

now,each period of 5/12

therefore,the duration of4 period will be 4×5/12

that is 20/12min

Answer 2

total no. of periods taken by teacher is = 4

duration of each period = 5/12

so, duration of 4 periods are =4x

4× 5/12

20/12

total duration =20/12

hope this will help you