FIND THE TIME
Number Theory
Level
pending
How long {time in seconds }will a 450m long train take to cross a girl walking with a speed of 5km/hr in direction of the moving train .the speed of the train is 65km/hr.
The answer is 27.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
let v{1} be the speed of the train in m\s and v{2} be the speed of the girl in m\s as they are moving in the same direction
(v{1} - v{2} )*t=s
(18-1.38)t=450
t=450/16.62
therefore t= 27s