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Michael Kom

· started a discussion

· 1 Months ago

how this ...? (Question: 193739.0 )

plis explain, how this formula is derived...
{Speed A / Speed B}*2 = Time taken by B / time taken by A

Question:

Two trains, A and B, start from stations x and y and move towards stations y and x respectively. After passing each other, they take 5 hrs 30 min and 2 hrs 45 min to reach y and x respectively. If the train A is moving at a speed of 36 km/hr, then the speed of the train B is – 

Options:
A) 48.8 km/hr
B) 50.9 km/hr
C) 51 km/hr 
D) 49.3 km/hr 
Solution:
Ans: (b)


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