The ratio between the speed of two trains is 7: 8.If the second train runs 400

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The ratio between the speed of two trains is 7: 8.If the second train runs 400km in 5 hours. The speed of the first train is

Options:

A . 70km/hr

B . 200km/hr

C . 250km/hr

D . 350km/hr

Answer: Option A

Let the speed of the first train be 7x km/hr
Then the speed of the second train is 8x km/hr
But speed of the second train = 400/5 km/hr = 80km/hr
=> 8x =80
=> X=10
Hence the speed of first train is (7 x 10)km/hr = 70km/hr

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