Answer:
see below
Step-by-step explanation:
Take the 4 lb container. Pour out rice and fill the 3 lbs container. What is left in the 4 lb container is 1 lb (4-3 =1)
Empty the 3 lbs container and put the 1lbs into it
Now measure rice into the 4 lbs container
We have 1lbs ( in the 3lbs container)
and 4 lbs ( in the 4 lbs container)
for a total of 5 bs