Question 94

Train A takes 45 minutes more than train B to travel a distance of 450 km. Due to engine trouble speed of train B falls by a quarter, so it takes 30 minutes more than Train A to complete the same journey. What is the speed of Train A (in km/hr)?

Solution

let the speed of train A be 'a' and that of B be 'b'
Given a(t)=b(t-(3/4))
also given a(t)=b(t+(1/2))
Therefore

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