Question

The scale on a map indicates that 8 cm is equal to 4.5 km. How for apart are two towns if the
distance between there two towns on the map is 12 cm.
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Answer 1

Answer:

1 cm/45 km = d/D

Substituting, we get:

1 cm/45 km = 4.5 cm/D

Cross-multiplying, we get:

D(1 cm) = (4.5 cm)(45 km)

D(1 cm)/(1 cm) = [(4.5 cm)(45 km)]/(1 cm)

D = (4.5 cm/1 cm)(45 km)

D = (4.5)(45 km)