Question

A map has a scale of 1 cm : 21 km. Two cities are 3.1 cm apart on the map. To the nearest tenth of a kilometer, what is the actual distance corresponding to the map distance?

A) 86.1 km
B) 170.1 km
C) 65.1 km
D) 68.2 km

Answer 1

Answer: 65.1

Explanation:

hope this helps

Answer 2

To answer the problem above, use the concept of ratio and proportion. The ratio between 1 cm to 21 km should be the same as the ratio of 3.1 cm to the actual distance. Let x be the unknown actual distance and mathematically express the situation,

(1 cm/ 21 km) = (3.1 cm / x km)

This equation gives a value for x which is 65.1 km. Therefore, the answer is letter C.