A train running at the speed of 60 km/hr crosses a pole in 21 sec. What is the length of the train?  Choose the correct answer.
A) 535 m
B) 178 m
C) 186 m
D) 350 m
E) 150 m
Speed = 60 * 5/18   = 50/3 m/sec   Length of the train   = speed * time   = 50/3 * 21= 
<gadget id="calculator">50/3 * 21</gadget>
<output>350</output>
350 m   Answer:350 m
<result>D</result>
A train running at the speed of 60 km/hr crosses a pole in 21 sec. What is the length of the train?