A simply supported beam of uniform cross section is subjected to a maximum bending moment of $2.25$ $t . m .$ If it has

rectangular cross section with width $15 c m$ and depth $30 c m$ , then the maximum bending stress induced in the beam will be

- 1
  
  $50 k g / c m^{2}$
- 2
  
  $100 k g / c m^{2}$
- 3
  
  $150 k g / c m^{2}$
- 4
  
  $225 k g / c m^{2}$

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