GMAT 考满分题库

- 数学PS -
It takes 10 hours for machine A and machine B to finish a certain job together. The working speed of A is 5 times faster than B. So how many hours does it take for A alone to do the same job?
  • A11.67
  • B12
  • C14
  • D60
  • E70
显示答案
正确答案: B

讨论题目 或 发起提问

|

题目讨论

  • 按热度
  • 按顺序

最新提问