a train travels at a certain average speed for a distance of 63 km and then travels at a distance of 72 km at an average speed of 6 km/h more than its original speed. if it takes 3 hours to complete total journey, what is the original average speed.
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Here's is Answer key for whole maths Leaked board paper 2018 =>
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Here's is Answer key for whole maths Leaked board paper 2018 =>
brainly.in/question/3121329
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