Multiple choice

In completing a project, Jason works twice as fast as Milli. If Milli can complete a work in 12 days independently, then the number of days in which Jason and Milli can together finish the work are

  1. 2 days

  2. 3 days

  3. 4 days

  4. 5 days

  5. 6 days
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Milli takes 12 days, so her rate is 1/12 work/day. Jason is twice as fast, so his rate is 2/12 = 1/6 work/day. Together, their rate is 1/12 + 1/6 = 3/12 = 1/4 work/day. They finish in 4 days.

AI explanation

Since Jason works twice as fast as Milli, Jason alone would take half the time Milli takes, meaning he can finish the work in 6 days. Applying the formula for combined work, multiply their individual completion times and divide by their sum: 12 multiplied by 6, divided by the sum of 12 and 6. This calculates to 72 divided by 18, giving the result of 4 days.

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