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Capacity is the amount of substance (usually a liquid or a gas) that a container can hold. Capacity is usually expressed in milliliters or liters. You can convert between milliliters and liters using the formula 1 liter = 1000 milliliters.

Volume on the other hand is the measure of the amount of space taken up by a substance. 

Practice questions
Question: Convert the following milliliters into liters
1. 1200 ml
2. 22000 ml
3. 4509 ml
( Answer: 1.2 l, 22 l, 4.509 l ) 

Measuring capacity

Capacity is measured by converting volume from cubic units to milliliters or liters. Volume is usually measured in cubic meters or cubic centimeter.

1 milliliter is equal to 1 cubic centimeters
1 liter = 1000 cubic centimeters
1000 liters is equal to 1 cubic meter

Practice questions
Question: Convert the following cubic centimeters into milliliters
4. 200 cubic cms
5. 3 cubic cms
6. 9000 cubic cms
( Answer: 200 ml , 3 ml , 9000 ml or 9 liters ) 

Practice questions
Question: Find the capacity of a cylindrical vessel whose base radius is 5 cms and height is 7 cms.
( Answer: Capacity of the cylinder    = volume of the cylinder
                    = π r2 h 
                    = 22 / 7 * 5 * 5 * 7
                    = 550 cubic cms = 550 mls
)

Question: A milk bottle has a capacity to hold 250 ml of milk. How much milk can be stored in 12 such bottles?
( Answer:     Capacity of 1 milk bottle     = 250 ml
        Capacity of 12 milk bottles    = 250 * 12
                        = 3000 ml or 3 liters
)

Question: Calculate the capacity of a cube of side 2 cms.
( Answer: Volume of the cube = s3 where s is the length of the side of the cube
                = 2 * 2 * 2
                = 8 cubic cms
    Capacity of the cube = its volume = 8 milliliters

Question: Calculate the capacity of a cuboid of length = 5 cms, width = 2 cms and height = 4 cms
( Answer:     Length of the cuboid l = 5 cms
        Width of the cuboid w = 2 cms
        Height of the cuboid h = 4 cms
        Volume of the cuboid = l * w * h
                    = 5 * 2 * 4
                    = 40 cubic cms
        Capacity of the cuboid = its volume = 40 milliliters
)

Question: Calculate the capacity of a cuboid of length = 4 cms, width = 5 cms and height = 4 cms
( Answer:     Length of the cuboid l = 4 cms
        Width of the cuboid w = 5 cms
        Height of the cuboid h = 4 cms
        Volume of the cuboid = l * w * h
                    = 4 * 5 * 4
                    = 80 cubic cms
        Capacity of the cuboid = its volume = 80 milliliters
)

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