A can finish a work in 20 days and B can finish it in 30 days. In how many days will they finish it working…

Time and Work · Quantitative Aptitude · Medium · Practice for SBI Clerk Prelims, SSC CGL Tier 1

A can finish a work in 20 days and B can finish it in 30 days. In how many days will they finish it working together?

  1. 10 days
  2. 18 days
  3. 16 days
  4. 12 days
Answer and solution

Correct answer: D) 12 days

Together per day: 1/20 + 1/30 = 1/12, so time = 12 days.

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