My Math Forum What is the speed of train A?

 Algebra Pre-Algebra and Basic Algebra Math Forum

 May 5th, 2018, 11:23 AM #11 Senior Member     Joined: Sep 2015 From: USA Posts: 2,264 Thanks: 1198 $75~mph$ is incorrect. $v_a(T-5) =(v_a-15)T = 450,~T>0$ is easily solved as $v_a = 45~mph,~v_b = 30~mph,~T=15~hr$ so once again Ganesh has turned a simple problem into a extended discussion.

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### two cities P And Q are separated by distance of 450 km..

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