540 cartoon of boxes prepares in 9 hours.
That mean, first we have to find the number of cartoon of boxed prepare in 1 hour
= no. of boxes/time taken
= 540/9
= 60
Therefore, 60 cartoon of boxes prepares in 1 hour
Now,
We have to find the number of boxes prepares in 3 hours
= no. of boxes in 1 hour × new time
= 60 × 3
= 180
Therefore, 180 cartoon of boxes prepares in 3 hours.
Method 2540 cartoon of boxes prepares in 9 hours. And we have too find the number of boxes prepares in 3 hours.
So,
= no. of boxes × new time / time taken
= 540 × 3 / 9
= 60 × 3
= 180
Therefore, 180 cartoon of boxes prepares in 3 hours.