Two trains are moving in opposite directions with speed of 150 km/hr and 90 km/hr respectively. Their lengths are 1.10 km and 0.9 km respectively. the slower train cross the faster train in --- seconds
Select
A) 56 B) 48 C) 47 D) 30 E) 25
Explanation:   Relative speed = 150+90= 
<gadget id="calculator">150+90</gadget>
<output>240</output>
240 km/hr (Since both trains are moving in opposite directions)   Total distance= 1.1+.9= 
<gadget id="calculator">1.1+.9</gadget>
<output>2</output>
2km   Time= 2/240 hr = 1/120 hr = 3600/120= 
<gadget id="calculator">3600/120</gadget>
<output>30</output>
30 seconds   Answer: Option 30
<result>D</result>
Two trains are moving in opposite directions with speed of 150 km/hr and 90 km/hr respectively. Their lengths are 1.10 km and 0.9 km respectively. the slower train cross the faster train in --- seconds