A train overtakes 2 girls who are walking inthe opposite direction in which the train is going at the rate of 3 km/hour & 6km/hour and passes them completely in 36sec & 30 sec respectively. Find the length of the train is?	Select:
A) 90 m
B) 120 m
C) 150 m
D) 190 m
E) 210 m
Let the length of the train e x meter, and let the speed of train be y km/h, then   \inline x=\left ( y+3 \right )\frac{5}{18}\times 36 ........(1)   and \inline x=\left ( y+6\right )\frac{5}{18}\times 30 ........(2)   From eq (1) and (2), we get   \inline (y+3)\times 36 = ( y+6)\times 30   y = 12 km/h   \inline \therefore \inline x=(y+3)\times \frac{5}{18}\times 36   x= 150 m   150 m
<result>C</result>
A train overtakes 2 girls who are walking inthe opposite direction in which the train is going at the rate of 3 km/hour & 6km/hour and passes them completely in 36sec & 30 sec respectively. Find the length of the train is?