A) 24 km/h
B) 36 km/h
C) 40 km/h
D) 45 km/h
Correct Answer: D
Solution :
Suppose length of train = x m According to the question, \[\frac{x+50}{14}=\frac{x}{10}\]\[\Rightarrow \]\[14x=10x+500\] \[\Rightarrow \] \[4x=500\] \[\Rightarrow \] \[x=\frac{500}{4}=125\,\,\text{m}\] Therefore, speed \[=\frac{125}{10}\times \frac{18}{5}=45\,\,\text{km/h}\]
You need to login to perform this action.
You will be redirected in
3 sec
