Question

There are two containers of capacities $500mL$ and $250mL$, each. How many times would you use the following containers to take out $5L$ of paint without spillage?
Number of containers with $500mL$ capacity $=A$
Number of containers with $250mL$ capacity $=B$

Answer 1

$1L=1,000mL$, so $5L=5\times 1,000=5,000mL$

First container:
Capacity of each container $=500mL$
Number of times the container is used $=5,000÷500=10$
So, $10A$ containers.

Second container:
Capacity of each container $=250mL$
Number of times the container is used $=5,000÷250=20$

So, $20B$ containers

Hence, option A is correct.