## Random Steps of a Drunk Man: Probability of Escaping the Cliff

**Problem**

From where he stands, one step toward the cliff would send the drunken man over the edge. He takes random steps, either toward or away from the cliff. At any step his probability of taking a step away is 2/3, of a step toward the cliff 1/3. What is his chance of escaping the cliff?

A. 2/27 | C. 4/27 |

B. 107/243 | D. 1/2 |

## Problem 917 | Combined Axial and Bending

**Problem 917**

For the structure in Problem 916, calculate the maximum compressive stress in bar *ABC* if its cross section is 200 mm square.

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## Problem 916 | Combined Axial and Bending

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## Problem 915 | Combined Axial and Bending

**Problem 915**

For the structure in Problem 914, compute the maximum tensile stress developed in bar *CB*.

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## Problem 914 | Combined Axial and Bending

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## Problem 913 | Combined Axial and Bending

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## Inner Circle Reading of the Double Vernier of a Transit

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## Problem 912 | Combined Axial and Bending

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## Problem 911 | Combined Axial and Bending

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## Length of Parabolic Sag Curve with Given Change in Grade Per Station

**Problem**

A grade of -5% is followed by a grade of 1%, the grades intersecting at the vertex (Sta. 10 + 060). The change of grade is restricted to 0.4% in 20 m. Compute the length of the vertical parabolic sag curve in meters.

A. 360 m | C. 300 m |

B. 320 m | D. 340 m |