If you are talking about metric measurements, 1 cm does not equal 5 km. There are 100,000 cms in a km, so 5 km is actually 500,000 cm
To answer your question going along with your assumption that if 1cm = 5 km, there would be 8.5 km in 1.7cm (1.7 x 5 = 8.5)
0.5 km = 50000 cm
40 km = 4,000,000 cm
1 cm equals 0.00001 km, therefore 2500 cm equals 0.025 km.
69,900,645,600,000 cm
80,000 cm
0.62 km = 620 m = 62,000 cm
317 cm = 0.00317 km
1.3cm equals 0.000013 km
1 cm = 0.00001 km
1 km = 100000 cm120 km:= 120 km * 100000 cm/1 km= 12000000 cm
0.0075 kilometers = 750 cm 1 km = 100,000 cm
6.78