freeCodeCamp/curriculum/challenges/english/99-dev-playground/daily-coding-challenges-javascript/javascript-challenge-11.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
68216eb60f957572e7c340c4	JavaScript Challenge 11: Mile Pace	28	javascript-challenge-11

--description--

Given a number of miles ran, and a time in "MM:SS" (minutes:seconds) it took to run those miles, return a string for the average time it took to run each mile in the format "MM:SS".

• Add leading zeros when needed.

--hints--

milePace(3, "24:00") should return "08:00".

assert.equal(milePace(3, "24:00"), "08:00");

milePace(1, "06:45") should return "06:45".

assert.equal(milePace(1, "06:45"), "06:45");

milePace(2, "07:00") should return "03:30".

assert.equal(milePace(2, "07:00"), "03:30");

milePace(26.2, "120:35") should return "04:36".

assert.equal(milePace(26.2, "120:35"), "04:36");

--seed--

--seed-contents--

function milePace(miles, duration) {

  return miles;
}

--solutions--

function milePace(miles, duration) {
  const [minutes, seconds] = duration.split(':').map(Number);
  const totalSeconds = minutes * 60 + seconds;
  const avgSecondsPerMile = totalSeconds / miles;

  const avgMinutes = Math.floor(avgSecondsPerMile / 60);
  const avgSeconds = Math.round(avgSecondsPerMile % 60);

  const paddedMinutes = avgMinutes.toString().padStart(2, '0');
  const paddedSeconds = avgSeconds.toString().padStart(2, '0');

  return `${paddedMinutes}:${paddedSeconds}`;
}