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If the length of the summit curve having SSD as 150m and deviation angle is 1 in 30 is ______

  • a)
    170m

  • b)
    100m

  • c)
    150m

  • d)
    50m 

Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
If the length of the summit curve having SSD as 150m and deviation ang...
Length of Summit Curve Formula:

The formula to calculate the length of the summit curve is L = (SSD/2) x tan(A/2)

Where,
L = Length of the summit curve
SSD = Safe stopping distance
A = Deviation angle

Given: SSD = 150m and A = 1 in 30

Calculation:

To calculate the length of the summit curve, we need to calculate the value of tan(A/2)

tan(A/2) = tan((1/30)/2) = tan(1/60) = 0.0003

Now, we can substitute the given values in the formula to get the length of the summit curve.

L = (150/2) x 0.0003
L = 22.5 x 0.0003
L = 0.0675 km or 67.5 m

Therefore, the length of the summit curve having SSD as 150m and deviation angle is 1 in 30 is 50m (approx).
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Community Answer
If the length of the summit curve having SSD as 150m and deviation ang...
The length of the summit curve is given by
L = NS2/4.4
L = 1*150*150/ (4.4*30)
L = 170m.
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