Computer · Surveying
What will be the Reduced Level (R.L.) of the top of a tower (point Q) when the base is accessible, given R.L. of point P = X, instrument height = h', horizontal distance to tower base = D, vertical angle = α, and neglecting curvature and refraction effects?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1X + h' + D × tan(α) + 0.06735 D2
- 2X + h' + D × tan(α)✓
- 3X + h' - D × tan(α)
- 4X - h' + D × tan(α) + 0.06735 D2
Correct answer
X + h' + D × tan(α)
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