Question
There were some flights of steps with the same amount of steps. For the first flight of steps, Luis ran up some steps and walked 3 steps. He took 30 seconds. For the next flight of steps, he walked 9 steps and ran the rest of the steps, and took a total of 42 seconds. How long would Luis take to run 4 flights of steps of the same number of steps? Express the answer in min and s.
4 m

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There were some flights of steps with the same amount of steps. For the first flight of steps, Luis ran up some steps and walked 3 steps. He took 30 seconds. For the next flight of steps, he walked 9 steps and ran the rest of the steps, and took a total of 42 seconds. How long would Luis take to run 4 flights of steps of the same number of steps? Express the answer in min and s.