exam Maths Puzzle Numerical Ability

a passenger trains speed is 60 mph and a freight trains speed is 40 mph. the passenger train travels the same distance in 1.5 hrs less time than the freight train. how long does it

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what is the answer too... 3a2(7a3-8b7) |4-5||m|=|32|
|1 2||n|=|-5|

Solve this matrix equation.