Question

A can do a piece of work in 4 hours; B and
C can do it in 3 hours. A and C an do it in 2
hours. How long will B alone take to do it?
A एक काम को 4 घंटे में कर सकता है। B
| और C इसी काम को 3 घंटे में तथा A और C
| 2 घंटे में कर सकते है। B अकेला इस काम को
कितने दिनों में करेंगा?​

Answer 1

Answer:

b will take 5 hrs

Step-by-step explanation:

Answer 2

Answer: 12 hours

Step-by-step explanation: one hour work of a = 1 / 4

1 hour work of B+C=1/ 3

One hour work of a + b + c =1/4+1/3=7/12

Now one hour work of a + c = 1 / 2

So 1 hour work of b = 7/12-1/2=1/12

So total time taken by B = 12 hours