Question

alone can finish a piece of work in 12 days and b alone can do it in 15 days how much time will be taken if both a and b work together​

Answer 1

Answer:

A can do a piece of work in 12 days and B in 15 days. ∴ the correct answer is 6 days.

Step-by-step explanation:

MARK IT BRAINLIST.

Answer 2

Answer:

Both can finish the work in 6 \frac{2}{3} 6

3

2

days

Step-by-step explanation:

Time taken by A to finish the work = 12 days

Time taken by B to finish the work = 15 days

Work done by A in 1 day = ½

Work done by B in 1 day = 1/15

Work done by (A+B) in 1 day = ( \frac{1}{12} + \frac{1}{15} ) = \frac{9}{30} = \frac{3}{20} (

12

1

+

15

1

)=

30

9

=

20

3

Time taken by (A + B) to finish the work \frac{20}{3}

3

20

days, i.e., 6 \frac{2}{3} 6

3

2

days.

Hence, both can finish the work in

6 \frac{2}{3} 6

3

2

days.