Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.15 km respectively. The time taken by the slower train to cross the faster train in seconds is?
Choose the correct answer:  A) 65 sec  B) 30 sec  C) 48 sec  D) 33 sec  E) 12 sec
Relative speed = 60 + 90= 
<gadget id="calculator">60 + 90</gadget>
<output>150</output>
150 km/hr.= 150 * 5/18 = 125/3 m/sec.   Distance covered = 1.10 + 0.15= 
<gadget id="calculator">1.10 + 0.15</gadget>
<output>1.25</output>
1.25 km= 1250 m.   Required time = 1250 * 3/125= 
<gadget id="calculator">1250 * 3/125</gadget>
<output>30</output>
30 sec.   Answer:30 sec
<result>B</result>
Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.15 km respectively. The time taken by the slower train to cross the faster train in seconds is?