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Question

As a part of a maintenance inspection the compressor of a jet engine is made to spin according to the graph as shown. The number of revolutions made by the compressor during the test is 

  1. 9000
  2. 11250
  3. 16570
  4. 12750


Solution

The correct option is B 11250
Number of revolution = Area between the graph and time axis = Area of trapezium
=12×(2.5+5)×3000=11250 revolution. 

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