Ritesh travels at 1 kmph 1 \text{ kmph} 1 kmph to reach a station 500 m 500 \text{ m} 500 m away from his house to catch a train. He starts walking bu...
Question
Ritesh travels at to reach a station away from his house to catch a train. He starts walking but after $4$ minutes, he realizes he forgot a document at home and returns at the same speed. What should be his speed (in kmph) on the way back to catch the train on time?