1. If 12 centimeters on a map equals 36 kilometers on the ground then what is th

Question

1. If 12 centimeters on a map equals 36 kilometers on the ground then what is the map scale? Then let say the map has a 1:48,000 scale. How many miles is comparable to 8 inches on the map? Convert verbals to map scale.

2. A stream is flows towards the southeast. It is 50 miles long and it flows from a mountain spring 3450 feet above sea level. The stream discharges into a river at an elevation of 1100 feet above sea level. What is: a) the bearing of the stream's headwaters and b) what is the gradient of the stream?

Explanation / Answer

1. 36km = 36 x 1000 x 100 cm = 3600000cm

Map scale = 12 : 3600000 = 1: 300000

Map scale = 1:48000

=> 1 inch on map = 48000 inches on ground

=> 8 inches on map = 8 x 48000 inches on ground = 384000 inches on ground

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