Peter, Paul and Mary, whose walking rates are 1 ft/sec, 3 ft/sec and 6 ft/sec, start walking together in the same direction arou

Question

guajiro [1.7K]

2 years ago

6

Peter, Paul and Mary, whose walking rates are 1 ft/sec, 3 ft/sec and 6 ft/sec, start walking together in the same direction arou

nd a circular track that is 300 feet in circumference. After how many minutes are Peter, Paul and Mary together again?

Mathematics

1 answer:

Oksanka [162] · Answer 1 · 2022-06-24T01:09:59+03:00

250 seconds because it takes Mary 50 seconds to get around the track (300feet/6ft/sec) and it takes Peter 300 seconds to get around the track (300ft/1ft/sec) so if you subtract the fastest time from the shortest time you get the amount of time that Mary had to wait for Peter to get there, so after 250 sec (300sec-50sec) Peter, Paul, and Mary are reunited.