9514 1404 393
Answer:
small: 1 liter; large: 7.5 liters
Explanation:
The difference between the two sets of buckets is 2 small buckets and 2 liters. Hence we know that a small bucket is 1 liter.
Then 5 small buckets contribute 5 liters to the 20-liter total. The remaining 15 liters comes from 2 large buckets, so each of those is 7.5 liters.
Large bucket: 7.5 liters
Small bucket: 1 liter