Multiple choice

J can finish a work in 24 days, K in 9 days and L in 12 days. K and L start the work but are forced to leave after 3 days. The remaining work was done by J in how many days?

  1. 15

  2. 12

  3. 6

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
AI explanation

Assuming the total work is the least common multiple of 24, 9 and 12, we get 72 units. The work rates are J equals 3 units per day, K equals 8 units per day and L equals 6 units per day. In 3 days, K and L complete 3 multiplied by 14 units, leaving 30 units of work for J. Dividing 30 units by J's rate of 3 units per day gives 10 days, which is not among the listed choices. The result is none of these.

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