Make a task of expression 50 to increase by the 6th plus 3 in brackets with sizes speed time distance how to solve a problem in a different way

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Well for example: The train went 50 kmch 6 meters, stopped, and reached 3 more meters. What distance it proyekhalpo to a formula we know, = speed to increase distance by time. At us (6+3) both we multiply time by 50 and =450 km turn out. Answer: 450 km.
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Answer add