20 km is 2 million cm
2 km
One km is 100,000 cm, therefore 2*100,000 is 200,00 cm. 2km is 200,000cm.
9000 cm = 0.09 km and is less than 2 km
2 km is greater.
2 km = 2*105 cm
1 km = 1000 m and 1 m = 100 cm, so 1 km = 100000 cm 2 km = 200000 cm ■
For determining which is the bigger unit we have to relate both the units to each other . we know, 1 km =100000 cm. 2 km =200000 cm which is greater than 9000 cm.
first lets find out the relation between cm and km . the relation is 1 km=100000 cm. 2 cm =0.00002 km . now finding the ratio of 2 cm to 1000 km . 0.00002 : 1000 = 2 : 10 ^ 8 = 1 : 10 ^ 8 /2 .
0.00002 km is 2cm
1 cm = 10-2 metres =10-5 km So, 8.5 cm = 8.5*10-5 km = 0.000085 km
200,000 cm