1.

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?

Answer»

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.

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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