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We have learnt how to change units like mm to cm, or cm to km
Let’s learn how to change square units as well
Hectares
Hectare is also a unit used to measure area.
1 hectare actually means 1 hecto metre square
1 hectare = 1 hector metre 2
1 hectare = 1 hm 2
Also,
1 hm = 100 m
(1 hm) 2 = (100 m) 2
1 hm 2 = 100 × 100 m 2
1 hm 2 = 10,000 m 2
∴ 1 hectare = 10,000 m 2
Lets take some examples
Find area of rectangle in m 2
Length = l = 50 cm
Breadth = b = 2000 cm
Area = l × b
= 50 × 2000
= 1,00,000 cm 2
= 1,00,000 × (1/100) 2 m 2
= 1,00,000 × 1/10,000 m 2
= 10 m 2
Find area of rectangle in cm 2
Length = l = 2 m
= 2 × 100 cm
= 200 cm
Breadth = b = 10 cm
Area = l × b
= 200 × 10
= 2000 sq. cm
= 2000 cm 2
Find area in m 2
Length = l = 500 cm
= 500 × 1/100 cm (As 1 cm = 1/100 m)
= 5 m
Breadth = b = 3 m
Area = l × b
= 5 × 3
= 15 sq. m
= 15 m 2
Find area of rectangle in m 2
Length = l = 2 km
= 2 × 1000 m (1 km = 1000 m)
= 2000 m
Breadth = b = 30 m
Area = l × b
= 2,000 × 30
= 60,000 sq. m
= 60,000 m 2
Find area of rectangle in km 2
Length = l = 2000 m
= 2000 × 1/1000 km (1m = 1/1000 km )
= 2 km
Breadth = b = 4 km
Area = l × b
= 2 × 4
= 8 sq. km
= 8 km 2
Find area of rectangle in hectare
Length = l = 6 km
= 6 × 1000 m (1km = 1000 m)
= 6000 m
Breadth = b = 10 m
Area = l × b
= 6000 × 10
= 60,000 m 2
= 60,000 × 1/10,000 hectare (1m 2 = 1/10,000 hectare)
= 6 hectare
Find area of rectangle in hectare
Length = l = 3 km
Breadth = b = 4 km
Area = l × b
= 3 × 4
= 12 km 2
= 12 × 10,00,000 m 2 (1km 2 = 10,00,000 m)
= 1,20,00,000 m 2
= 1,20,00,000 × 1/10,000 hectare (1m 2 = 1/10,000 hectare)
= 1,200 hectare
Change units
50 cm 2 in mm 2
= 50 cm 2
= 50 × 1 cm 2
= 50 × (10 mm) 2 (1 cm = 10 mm)
= 50 × 100 mm 2
= 5,000 mm 2
2 ha in m 2
= 2 hectare
= 2 × 10,000 m 2 (1ha = 10,000 m 2 )
= 20,000 m 2
10 m 2 in cm 2
= 10 m 2
= 10 × 1 m 2
= 10 × (100 cm) 2
= 10 × 10,000 cm 2 (1 m = 100 cm)
= 1,00,000 cm 2
10 cm 2 in m 2
= 10 cm 2
= 10 × 1 cm 2
= 10 × (1/100 m) 2
= 10 × 1/10000 m 2 (1 cm = 1/100 m)
= 1/1000 m 2
= 0.001 m 2
