Length:1mm =10cm1cm =10dm/dm =1000m =1km.
Area: 1 cm2 = 1 00mm2 1 cm2 =1cm2 =100mm2.
1 km2 = 100 hectares =1100 million m2.
Volume: 1 cm3 = 1000 m3 1 dm3 = 1000 m3 = 1 000 m3.
Volume: 1 cubic decimeter = 1L= 1000 cubic centimeter = 1000ml.
Hope to adopt, thank you!