Question

2 persons can paint a wall in 12 days the first person works alone paint 1/3 of the wall in 10 days and then he leaves if the second person was to paint the remaining wall alone in how many days will he be completing the job. please tell​

Answer 1

Answer:

2day or 2 and half

Step-by-step explanation:

As the wall is wall

Answer 2

In 13.33 days the second person will complete the remaining work.

Step-by-step explanation:

Let us assume that the second person will paint the remaining part of the wall (i.e. 2/3 part) in x days.

Now, in 1 day he will complete $\frac{2}{3x}$ part of the total wall.

Again, the first person does $\frac{1}{3}$ part of wall in 10 days,

So, in 1 day he will complete $\frac{1}{30}$ part of the wall.

So, working together in 1 day they will do $(\frac{1}{30} + \frac{2}{3x} ) = \frac{20 + x}{30x}$ part of the wall.

So, the whole wall will be painted in $\frac{30x}{20 + x}$ days.

Given that, $\frac{30x}{20 + x} = 12$

⇒ 30x = 240 + 12x

⇒ 18x = 240

⇒ x = 13.33 days.

So, in 13.33 days the second person will complete the remaining work. (Answer)