Gradient
2009-03-07 7:26 pm
On a map with the scale of 1:20000, a road of 3km long is represented by a 14.4 cm long line segment. What is the average gradient of the road?
回答 (1)
2009-03-07 7:41 pm
✔ 最佳答案
If the gradient of the road is 0 , it should be represented by a 3*100000 / 20000 = 15 cm long line segment.
So the average gradient of the road = [(15^2 - 14.4^2)^ 1/2] / 14.4
= 4.2 / 14.4
= 7 / 24
收錄日期: 2021-04-21 22:04:41
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