marla starts running around a circular track at the same time nick starts walking around the same circular track . marla completes 28 laps around the track per hour and nick completes 13 laps around the track per hour . how many minutes after marla and nick begin moving will marla have completed 4 more laps around the track than nick ?
"maria ' s rate - 28 laps per hour - - > 28 / 60 laps / min nick ' s rate - 13 laps per hour - - > 13 / 60 laps / min lets set equations : 28 / 60 * t = 4 ( since maria had to run 4 laps before nick would start ) 13 / 60 * t = 0 ( hick has just started and has n ' t run any lap yet ) ( 28 / 60 - 13 / 60 ) * t = 4 - 0 ( since nick was chasing maria ) t = 16 min needed maria to run 4 laps answer : d"
divide(4, subtract(divide(28, multiply(add(13, const_1), 28)), divide(13, multiply(add(13, const_1), 28))))