Does this make sense?? lets check
if he packs one muffin he would then have packed two rolls.
He packs crackers 2.5 times faster than rolls
Does this make sense? (yes)
Now we can use the above info to solve 250 crackers in one hr so we solve
now using r=100 in the 1st equation we get
so he can pack 50 muffins in one hour. yeah!!