A train has a length of 150 meters . it is passing a man who is moving at 7 km/hr in the same direction of the train, in 3 seconds. Find out the speed of the train.  Choose the correct choice from the following choices.
A) 182 km/hr  B) 180 km/hr  C) 152 km/hr  D) 169 km/hr  E) 187 km/hr
187 km/hrxplanation:   Length of the train, l = 150m   Speed of the man , Vm= 7 km/hr   Relative speed, Vr = total distance/time = (150/3) m/s = (150/3) × (18/5) = 180 km/hr   Relative Speed = Speed of train, Vt - Speed of man (As both are moving in the same direction)   =&gt; 180 = Vt - 7   =&gt; Vt = 180 + 7= 
<gadget id="calculator">180 + 7</gadget>
<output>187</output>
187 km/hr   Answer: Option 187 km/hr
<result>E</result>
A train has a length of 150 meters . it is passing a man who is moving at 7 km/hr in the same direction of the train, in 3 seconds. Find out the speed of the train.