Mathematics, 12.11.2019 07:31, smelcher3900
Boris is playing on the mall escalators. one escalator goes up, one goes down, and one is out of service; otherwise, they're all identical. the up and down escalators go at the same speed. you can assume that boris always runs at the same speed.
boris can run up the up escalator in 6 seconds. he can run up the down escalator in 30 seconds. how long does it take him to run up the out-of-service escalator? explain your answer.
hint(s):
let e be the moving escalators' speed and let b be boris's running speed. in terms of e and b, what speeds can you learn from the problem? try expressing these speeds in flights per minute (a flight is one trip from the bottom to the top).
Answers: 1
Mathematics, 21.06.2019 13:00, chazpooh208
Small kingdoms on the iberian peninsula fought to take land back from the moors during which event? the hundred years’ war the wars of the roses the reconquista the great schism
Answers: 2
Mathematics, 21.06.2019 19:30, joselinegarciaowyrpf
Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.
Answers: 1
Boris is playing on the mall escalators. one escalator goes up, one goes down, and one is out of ser...
Mathematics, 15.04.2021 06:20
Mathematics, 15.04.2021 06:20
Mathematics, 15.04.2021 06:20
Mathematics, 15.04.2021 06:20
Mathematics, 15.04.2021 06:20