1 . 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 ?

• A. 15 : 5 : 3
• B. 15 : 5 : 7
• C. 3 : 15 : 5
• D. 15 : 3 : 5

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Answer: Option A

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