Two trains are moving in opposite directions with speed of 90 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) 40	C) 47	D) 26	E) 25
Explanation:   Relative speed = 90+90= 
<gadget id="calculator">90+90</gadget>
<output>180</output>
180 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= 2/180 hr = 1/90 hr = 3600/90= 
<gadget id="calculator">3600/90</gadget>
<output>40</output>
40 seconds   Answer: Option 40
<result>B</result>
Two trains are moving in opposite directions with speed of 90 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