The ratio between the speeds of two trains is 2 : 5. If the first train runs 350 km in 5 h, then the difference between the speeds (in km/h) of both the trains is:
Let the speed of two trains be 2p and 5p respectively
Speed of first train = $$\frac{\ 350}{5}$$ = 70 km/hr
$$=$$> 2p = 70
$$=$$> p = 35
$$\therefore\ $$Difference between speed of both trains = 5p-2p = 3p = 3(35) = 105 km/hr
Hence, the correct answer is Option B
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