A worker takes 3 hours to do a job. A new worker takes 5 hours. How long does it take them if they work together?

Question

A worker takes 3 hours to do a job. A new worker takes 5 hours. How long does it
take them if they work together?

in progress 0
Linh Đan 4 years 2021-08-27T10:51:48+00:00 1 Answers 8 views 0

Answers ( )

  1. kimchi2
    0
    2021-08-27T10:53:06+00:00
    Reply

    time taken by a worker= 1/3 hours

    time taken by the new worker= 1/5 hours

    time taken to complete the work if they work together

    = 1/3 + 1/5

    = 5+3/15

    =8/15

    =15/8 hours

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )