A train 575 m long crosses a tunnel of length 325 in 90 sec. What is the speed of the train in kmph.  Choose the most appropriate option
A) 28
B) 32
C) 36
D) 24
E) 42
Explanation :   Total distance traveled = Length of train + Length of tunnel = 575 + 325= 
<gadget id="calculator">575 + 325</gadget>
<output>900</output>
900   Time taken to cross the tunnel= 90 sec.   Speed in kmph = distance/time *18/5 = 900/90 * 18/5 = 180/5= 
<gadget id="calculator">180/5</gadget>
<output>36</output>
36 kmph   Answer: 36
<result>C</result>
A train 575 m long crosses a tunnel of length 325 in 90 sec. What is the speed of the train in kmph.