The ratio between the speeds of two trains is 5: 6. If the second train runs 300 kms in 5 hours, then the speed of the first train is ?
Choose the correct choice from the following.
A) 60 km/hr
B) 50 km/hr
C) 55 km/hr
D) 65 km/hr
E) None of these
Explanation:   Let the speeds of two trains be 5X and 6X km/hr.   6/X=300/5=&gt;X=10 Km/hr   So speed of first train is   10*5= 
<gadget id="calculator">  10*5</gadget>
<output>50</output>
50 km/hr   Option 50 km/hr
<result>B</result>
The ratio between the speeds of two trains is 5: 6. If the second train runs 300 kms in 5 hours, then the speed of the first train is ?