Question

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Part 1
A protected wilderness area in the shape of a rectangle is 5 kilometers long and 3.6 kilometers wide. The forest is to be surrounded by a hiking trail that will cost ​$10,000 per mile to construct. What will it cost to install the​ trail? Note that 1 mile ​(mi)almost equals1.6 kilometers​ (km).

Answer 1

Perimeter = 2(5 + 3.6) = 17.2 km.
Convert to miles: 17.2 km ÷ 1.6 km/mi = 10.75 mi.
Cost = 10.75 mi × $10,000/mi = $107,500.

So the trail will cost $107,500.