11. Cost of a 20MW power plant in the year 2000 was 250 crore with cost index of materials being 200. In 2012 this cost index stood at 450. Estimate the cost of a 100 MW power plant in 2012 with power sizing factor of 0.75.

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Strain energy

The term strain indicates the variation in an object's length, area, and volume when the object is subjected to an external force. The external force may be of normal, shear, moment, torque, etc. The strain in an object depends on the types of external force and cross-section of the object. Mathematically, the evaluation of strain can be obtained with the help of elastic constants.