Question

Jake has timed that a train takes 40 seconds to cross the platform he is standing on while it takes just 15 seconds to cross him. if the average speed of train is 90 k mph, what is the length of the platform in meters?

Answer 1

hi there,
if the speed of train is 90 kmph
and it takes 40 sec to cross the platform

then I convert the kmph to meter ph that is,
90×5/18=25 m/sec

25 m/sec × 40 sec = 1000 m

the length of platform is 1000 meters.

I hope it helped you.