Question

If 1hour 30minutes is taken for 20 sums then how many minutes are taken for 1 sum

Answer 1

We know that, 1 hour = 60 minutes

Therefore, 1 hour 30 minutes

= 1 hour + 30 minutes

= 60 minutes + 30 minutes

= 90 minutes

Given that,

20 sums are done in 90 minutes

1 sum will be done in 90/20 minutes

= 9/2 minutes

= 4.5 minutes

Answer 2

1 hour=60 minutes

Half hour=30 minutes

Then total time=60+30 minutes

90 minutes

In 20 sums total time taken=90 minutes

The time taken in 1 sum =90/20

4.5 minutes