A train running at a speed of 36 km/h passes an electric pole in 14 seconds. In how many seconds will the whole train pass a 350-meter long platform?	Choose the correct choice
A) 43	B) 45	C) 47	D) 49	E) 51
Let the length of the train be x meters.   When a train crosses an electric pole, the distance covered is its own length x.   speed = 36 km/h = 36000 m / 3600 s = 10 m/s   x = 14 * 10= 
<gadget id="calculator">14 * 10</gadget>
<output>140</output>
140 m.   The time taken to pass the platform= (140 +350)/ 10= 
<gadget id="calculator">(140 +350)/ 10</gadget>
<output>49</output>
49 seconds   The answer is 49.
<result>D</result>
A train running at a speed of 36 km/h passes an electric pole in 14 seconds. In how many seconds will the whole train pass a 350-meter long platform?