Multiple choice

'A' can do a piece of work in 16 days. 'B' can do the same work in 8 days. How long would both of them take to do the same work?

  1. 5 days

  2. 14/3 days

  3. 16/3 days

  4. 6 days

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A's rate is 1/16 work/day and B's rate is 1/8 work/day. Combined rate is 1/16 + 2/16 = 3/16 work/day. The time taken is the reciprocal, 16/3 days.

AI explanation

Using the combined work rate formula, their joint daily work rate is 1/16 + 1/8 = 3/16 of the task per day. The total time to complete the work is the reciprocal of this combined rate, which is 16/3 days.