To calculate the scale factor between the two distances, we need to divide the larger distance by the smaller distance. In this case, 500 km divided by 2 cm gives us a scale factor of 250 km/cm. This means that each centimeter on the map represents 250 kilometers in reality. This scale can be used to convert distances on the map to actual distances on the ground.
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2 km
There are 500 metres in 1/2 of a km
20 nm = 500 × 10^-9 m 2 cm = 2 × 10^-2 cm → 2 cm ÷ 500 nm = (2×10^-2 m) ÷ (500 × 10^-9 m) = (2÷500) × 10^(-2 - -9) = 0.004 × 10^7 = 4 × 10^4 = 40,000
Convert the units of both sides to the same, then remove the units and simplify (if possible by dividing both sides by a common divisor greater than 1). eg The Landranger series map scale of 2 cm equals 1 km: 1 m = 100 cm 1 km = 1,000 m → 1 km = 1,000 x 100 cm = 100,000 cm 2 cm : 1 km → 2 cm : 1 x 100,000 cm → 2 cm : 100,000 cm → 2 : 100,000 → 1 : 50,000
to what? ft²? cm²? km²? yd²?