two trains are moving in opposite directions with speed of 70 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 Pick one.
A) 56	B) 45	C) 47	D) 26	E) 25
<gadget id="calculator">1.1 + 0.9</gadget>
<output>2</output>

<gadget id="calculator">70 + 90</gadget>
<output>160</output>

<gadget id="calculator">2 / 160</gadget>
<output>1/80 = around 0.0125</output>

<gadget id="calculator">(1/80) * 3_600</gadget>
<output>45</output>

<result>B</result>
two trains are moving in opposite directions with speed of 70 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
multiply(divide(add(1.10, 0.9), add(70, 90)), const_3600)
"explanation : relative speed = 70 + 90 = 160 km / hr ( since both trains are moving in opposite directions ) total distance = 1.1 + . 9 = 2 km time = 2 / 160 hr = 1 / 80 hr = 3600 / 80 seconds = = 45 seconds answer : option b"