5 km.
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100 cm = 1 m 1000 m = 1 km → 1000 x 100 cm = 1 km → 100000 cm = 1 km → To convert cm to km, divide by 100000 → 86000 cm = 86000 ÷ 100000 km = 0.86 km
To convert the units to the same measurement, we need to convert 1 km to cm. There are 100,000 cm in 1 km (1 km = 100,000 cm). Therefore, the ratio of 4 cm to 1 km is 4:100,000, or simply 4:100,000.
100 cm = 1 m 1000 m = 1 km ⇒ 1000 x 100 cm = 1km ⇒ 100000 cm = 1 km ⇒ 120 cm = 120 ÷100000 km = 0.0012 km
1 km = 1000 m 1 m = 100 cm Therefore, 1 km = 100 000 cm and 5.2 km = 520 000 cm or 520 thousand centimeters.
1 km = 1000 metres and 1 metre = 100 cm so 1 km = 105 cm So 400 km = 4*107 cm.