Q1) The gradient of a road is 1:20. After walking 50m along the road, what is the horizontal distance travelled?
Q2) The angle of inclination of a road is 15 degree. If the gradient is 1:n , find n.
gradient
2008-03-08 5:31 am
回答 (1)
2008-03-08 5:42 am
✔ 最佳答案
let the inclination of road be A degreetan A=1/20
horizontal distance =50cos A=50x20/√401=49.93m
2008-03-07 21:44:29 補充：
1)
let the inclination of road be A
tan A=1/20
horizontal distance =50cos A=50x20/√401=49.93m
2)
tan 15°=1/n
n=3.73
收錄日期: 2021-04-13 15:15:25
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