Question

How to measure km by thread
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Answer 1

Answer:

To find the remaining portion, Mark a point at 5 on the thread. And then measure the distance between the two marked points, on the small scale before 0 mark. Therefore total length of the metal Road on map is 11 cm. The scale of a topographic map is usually 2cm=1km.

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Answer 2

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To find the remaining portion, Mark a point at 5 on the thread. And then measure the distance between the two marked points, on the small scale before 0 mark. Therefore total length of the metal Road on map is 11 cm. The scale of a topographic map is usually 2cm=1km.