প্রশ্ন সংশোধন করুন
প্রশ্ন:
A man in a train notice that he can count 21 telephone posts in one minute.. If they are known to be 50 meters apart, then at what speed is the train travelling?
A man in a train notice that he can count 21 telephone posts in one minute.. If they are known to be 50 meters apart, then at what speed is the train travelling?