GB-17-06-001 · Scale drawings
A map has scale 1 : 250000. Two places are 8.2 cm apart on the map. Work out the actual distance in kilometres.
Scale Drawings & Map Ratios
Application of related method — Booklet p. 18
Method
1) Multiply map length (cm) by scale factor to get actual cm
2) Divide by 100,000 (100 cm/m × 1000 m/km) to convert to km
Worked Example (GB-17-06-001)
1)
Multiply 8.2 by 250000 to find the distance in centimetres.
2)
Divide by 100 000 to convert centimetres to kilometres.
3)
20.5 km
Ans =
20.5 km