Multiple choice

Mandeep works 3 times as fast as Sampat. If Sampat can complete a job alone in 60 days, then in how many days can they together finish the job?

  1. 7 days

  2. 4 days

  3. 5 days

  4. 15 days
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sampat's rate = 1/60. Mandeep's rate = 3 * (1/60) = 3/60 = 1/20. Combined rate = 1/60 + 3/60 = 4/60 = 1/15. Together they take 15 days.

AI explanation

Since Mandeep works 3 times as fast as Sampat, Mandeep alone would complete the job in 20 days. Taking the total work as 60 units, Sampat works at 1 unit per day and Mandeep works at 3 units per day. Their combined daily work is 4 units, so dividing the 60 units by 4 gives a completion time of 15 days.

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