The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.

• A. <img src="/_files/images/civil-engineering/rcc-structures-design/74-13-69-1.png">
• B. <img src="/_files/images/civil-engineering/rcc-structures-design/74-13-69-2.png">
• C. <img src="/_files/images/civil-engineering/rcc-structures-design/74-13-69-3.png">
• D. <img src="/_files/images/civil-engineering/rcc-structures-design/74-13-69-4.png">
• E. <img src="/_files/images/civil-engineering/rcc-structures-design/74-13-69-5.png">