#### Problem Statement:

A single bolt is used to lap joint two steel bars together. Tensile force on the bar is 20,000 N. Determine the diameter of the bolt required if the allowable shearing stress is 70 MPa?

- A. 17 mm
- B. 18 mm
- C. 19 mm
- D. 20 mm

#### Problem Answer:

The diameter of the bolt required is **19 mm**.

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