Two goods trains each 625 m long are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one?
Choose the correct choice from the following options.
A) 40  B) 45  C) 48  D) 60  E) 44
Relative speed = 45 + 30= 
<gadget id="calculator">45 + 30</gadget>
<output>75</output>
75 km/hr.   75 * 5/18= 125/6 m/sec.   Distance covered = 625 + 625= 
<gadget id="calculator">625 + 625</gadget>
<output>1_250</output>
1250 m.   Required time= 1250 * 6/125= 
<gadget id="calculator">1250 * 6/125</gadget>
<output>60</output>
60 sec.   Answer: Option 60
<result>D</result>
Two goods trains each 625 m long are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one?