If the ratio of speed of doing work of the persons is 1 : 3 : 5 , what is the ratio of this taken by these people to do the same amount of work ?

If the ratio of speed of doing work of the persons is 1 : 3 : 5 , what is the ratio of this taken by these people to do the same amount of work ? Correct Answer 15 : 5 : 3

Given, 1 : 3 : 5 It is 11:13:15 = 1×15:13×15 :15×15 = 15 :5:3
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