A train 50 m long passes a platform 100 m long in 10 seconds. The speed of the train in m/sec is ? Choose the correct option:
A) 150	B) 50	C) 10	D) 15	E) 12
Speed of train = distance covered / time.   = (50 + 100) / 10= 
<gadget id="calculator">(50 + 100) / 10</gadget>
<output>15</output>
15 m/sec.   Answer : 15
<result>D</result>
A train 50 m long passes a platform 100 m long in 10 seconds. The speed of the train in m/sec is ?