Question

. A can do a piece of work in 12 days, B can do it in 15 days and C
can do it in 20 days. They start the work together. But, after 3
days, A leaves off and B left 3 day before the completion of the
work. C will do the remaining work. In how many days will the
work get complete?
एक कार्य को A, 12 दिनों में, B, 15 दिनों में तथा C, 20 दिनों में पूरा
कर देते हैं। सभी एक साथ कार्य शुरू करते हैं, लेकिन 3 दिन बाद A
कार्य छोड देता है तथा कार्य समाप्त होने से 3 दिनों पहले B कार्य
छोड़ देता है। बचे हुए कार्य को C समाप्त करता है। कार्य कितने दिनों
में पूरा हुआ?
1) 8 days 2 2)4 days 3) 9
4)
4
​

Answer 1

Answer:

9 days aaana chahie mere hisab se

Answer 2

Answer:

They work completed in 8 days...but if consider 0.14 days it will become 9 days

Step-by-step explanation:

...

The wok done by the worker in 1 day = 1/12+1/15+1/20= 12/60 =1/5

...

Sicey the workers done work together= 3 days

So work completed in e days = 1/5×3 = 3/5

Now as given in the question that B leaves 3 days before the completion of work so the work done by the C alone in 3 days = 3/20

Now total work completed = 3/5+3/20 = 15/20 = 3/4

Now the work remain to do A and B together = 1-3/4 = 1/4...

Let the number of days be X to complete the work 1/4 by the A and H together

So 1/15×X + 1/20×X= 1/4

X(4+3)60= 1/4

7X/15=1

X =15/7

X= 2.1...