Question

Calculate the actual length of a road with 10.5cm using a scale of 2cm to 1km?

Answer 1

5.25 km

Explanation:

`2 cm -> 1 km`
`10.5 cm -> x km`

Set up ratios comparing the same units to each other.

`(1 km)/(2cm)=(x)/(10.5 cm)`

`((1 km)*(10.5cm))/(2cm)=x`

`x=5.25 km`