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    Standard and non-standard units

                                         non-standard units                 Standard units

                                                     Jar                    Millilitre (mL)
                                                                            Litre (L)
                                                     Cup                    Kilolitre (kL)

                We have learnt about the non-standard units of capacity in the previous class. Here
                we shall learn about the standard units.

                Millilitre

                Small quantities of liquids are measured in millilitres
                (mL). For example, a cup of tea, medicine, a glass
                of water, etc. are measured in mL.

                Litre                                                           50 mL           100 mL           150 mL
                Large quantities of liquids are measured in litres (L). For example, water in a large

                can, a bath tub full of water, a drum of oil, etc. are measured in L.

                                                                                              Oil

                                      20 L                     150 L                        12 L
                Vessels of different sizes  used  to  measure  different quantities  of liquid  are shown
                below.

                            50 mL          100 mL         200 mL            500 mL                  1 L

                       172       Mathematics 3

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