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c. d.

Giant Panda Ganges River Dolphin
Length (in m) : 1 m 82 cm Length (in m) : 2 m 12 cm
Length (in cm) : _________ Length (in cm) : _________
Weight (in kg) : 95 kg Weight (in kg) : 76 kg
Weight (in g) : _________ Weight (in g) : _________

e. f.

Indian Elephant Mountain Gorilla
Height (in m) : 3 m 2 cm Height (in m) : 1 m 68 cm
Height (in cm) : _________ Height (in cm) : _________
Weight (in kg) : 5400 kg Weight (in kg) : 145 kg

Weight (in g) : _________ Weight (in g) : _________

2. An elephant can draw approximately 15 litres of water into its trunk at a

time. Convert 15 litres into millilitres. 15 L = __________ mL

MEASuREMEnT of LEnGTh

We have learnt about the units of length earlier. Some of these are millimetre (mm),
centimetre (cm), metre (m) and kilometre (km). Metre (m) is the base unit of length.

The choice of unit depends on the length or height of the object to be measured.

unit Comparison uses

millimetre (mm) smaller than a centimetre for measuring very small lengths
centimetre (cm) smaller than a metre but for measuring small lengths
greater than a millimetre

metre (m) base unit for measuring bigger lengths and
distances
kilometre (km) greater than a metre for measuring longer distances

166 Mathematics 5