Professor

Karan, Kabir and Kartik can together finish a project in 4 days. Karan by himself can do it in 12 days and Kabir by himself can do it in 10 days. How many days will Kartik take to finish the Project alone?

- 15
- 13
- 14
- 10

1 Answers

Professor

**Answer: (1) 15 days**

**Explanation:**–

Karan, Kabir and Kartik can together finish a project = 4 days

Karan, Kabir and Kartik can together work in a day = 1/4

Karan can finish it project = 12 days

Karan can do work in a day = 1/12

Kabir can finish it project = 10 days

Kabir can do work in a day = 1/10

karan & Kabir can do work in same day = 1/12 + 1/10

= (10 + 12)/120

= 22/120

= 11/60

Kartik can work in a day = 1/ 4- 11/60

= (60 – 44)/240

= 16/240

= 2/30

= 1/15

Therefore, Kartik can finish the project = 15 days.

Hence, the answer is (1) 15 days.

Answered by Anurag Mishra on 1st August 2015..