A bar of length l is uniformly tapering from a diameter d1 at one and to a diameter d2 at the other end. The bar is subjected to an axial tensile loads. What is the total elongation (where E = Young's modulus of elasticity. )

• A. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/58-1546-1.png">
• B. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/58-1546-2.png">
• C. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/58-1546-3.png">
• D. 4 +
• E. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/58-1546-1.png">