A train travels (2xsquare + 13x + 15) km in (x+5) hours. What is the average speed of the train?

Dear Student,

We have,Average speed=Distance Time                         =2x2+13x+15x+5                         =2x2+10x+3x+15x+5                         =2xx+5+3x+5x+5                         =2x+3x+5x+5                         =2x+3Hence average speed is 2x+3km/hr.

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