![SOLVED: A boy runs one km in 12 minutes. How long will he take to run 400 m? SOLUTION WITH STEP BY STEP PLEASE. SOLVED: A boy runs one km in 12 minutes. How long will he take to run 400 m? SOLUTION WITH STEP BY STEP PLEASE.](https://cdn.numerade.com/ask_previews/36e4840e-bbb7-4795-9c3b-690638b6f755_large.jpg)
SOLVED: A boy runs one km in 12 minutes. How long will he take to run 400 m? SOLUTION WITH STEP BY STEP PLEASE.
Is running 1 km in 6:15 minutes good or bad for a starter? How can I increase distance without injuring myself? - Distance Running Network - Quora
![Sub 3 minute 1k! Top athlete shows how to run 1km time trial... FAST! Are you up to the challenge??? - YouTube Sub 3 minute 1k! Top athlete shows how to run 1km time trial... FAST! Are you up to the challenge??? - YouTube](https://i.ytimg.com/vi/BUsBYffEvCI/maxresdefault.jpg)
Sub 3 minute 1k! Top athlete shows how to run 1km time trial... FAST! Are you up to the challenge??? - YouTube
![Why 1km Repeats with Short Rest is a Misguided Interval Set: An Introduction into Work:Rest Ratios. — METS Performance Consulting Why 1km Repeats with Short Rest is a Misguided Interval Set: An Introduction into Work:Rest Ratios. — METS Performance Consulting](https://images.squarespace-cdn.com/content/v1/589286b53e00be6ae883e566/1486955653425-4359O0R37PDEZGX0EEEP/image-asset.jpeg)