Observe the table and answer the question that follow.

Kiloliter	Hectoliter	Dekaliter	Deciliter	Centiliter	Milliliters
45
				15
	65
					120

2.2 hectoliters of water measures __________ dekaliters.

The correct answer is: 22

The given quantity of water in 2.2 hectoliters. We are asked to find the quantity of water in dekaliters.
To convert the quantity, we must know the relation between them.
1 hectoliters = 10 dekaliters.
To convert 2.2 hectoliters into dekaliters, we will multiply the given quantity by 10
2.2 hectoliters = 2.2 × 10
= 22 dekaliters
Therefore, the quantity of water is 22 dekaliters.

For such questions, we should know about the conversion of units.