Question

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

• A. 9000
• B. 16570
• C. 12750
• D. 11250

Answer 1

Answer: (D)

11250

Answer 2

Number of revolution = Area between the graph and time axis = Area of trapezium

= $\frac{1}{2} \times (2.5 + 5) \times 3000$ = 11250 revolution.