How many quarts equal five gallons, and how many liters equal five gallons?

Hint:
In the given question, we have been to convert five gallons to quarts. Then, we also have to convert five gallons to liters. To do that, we write their basic relation – one gallon to quarts and one gallon to liter. Then we just multiply the one gallon by five. That will simply give us the answer.

Complete step by step answer:
We know, \[1{\rm{ }}gal{\rm{ }} = {\rm{ }}4.546{\rm{ }}l\]
Hence, \[5{\rm{ }}gal{\rm{ }} = {\rm{ }}4.546 \times 5{\rm{ }} = {\rm{ }}22.73{\rm{ }}l\]
Now, \[1{\rm{ }}gal{\rm{ }} = {\rm{ }}4{\rm{ }}quarts\]

Hence, \[5{\rm{ }}gal{\rm{ }} = {\rm{ }}4 \times 5{\rm{ }} = {\rm{ }}20{\rm{ }}quarts\]

Additional Information:
These given quantities – quarts and gallons are not imperial units. They are part of the US customary system and of British imperial units.
If we have to convert liters to milliliters, deciliters, et cetera, we just multiply by the corresponding powers of ten. These are imperial units.

Note:
For solving questions of such type, we first write what has been given to us. Then we write down what we have to find. Then we write the formula which connects the two things. We saw that if we have been given two different measurement units whose relation we do not know, we first convert a single standard unit to each of them. Then we just divide the two things with which we will get the direct relation of the two units and then we directly solve it.