Fill 3L bottle
Empty it into 5L bottle
Fill 3L bottle again
Fill 5L bottle, leaving 1L in 3L bottle
Empty 5L bottle into drain
Pour the 1L into the 5L bottle
Fill 3L bottle
Add the 3L to the 1L already in 5L bottle
Lots of ways.
- Forums
- Humour
- Measure this...