Anew crew of painters can paint a small apartment in 12 hours and experience crew can paint a small apartment in six hours how many hours does it take to paint the apartment on the true cruise work together

The new crew and the experience crew working together can paint the apartment in 4 hours.

Step-by-step explanation:

Given:

Time taken by new crew of painters to paint an apartment = 12 hours

Time taken by experience crew of painters to paint an apartment = 6 hours

To find the time taken by them to  paint the apartment working together.

Solution:

Using unitary method to determine their 1 hour work.

In 12 hours the new crew can paint = 1 apartment

So,in 1 hours the new crew can paint = of the apartment

In 6 hours the experience crew can paint = 1 apartment

So,in 1 hour the experience crew can paint = of the apartment

Now, the new crew and the experience crew are working together.

So, in 1 hour, they can paint :

⇒

Taking LCD = 12, we will add fraction.

⇒

⇒

Simplifying fraction we have:

⇒ of an apartment

Again using unitary method to determine the time taken by them working together to paint the whole apartment.

They can paint   of an apartment in 1 hour.

To paint 1 apartment they will take  = hours

Thus, the new crew and the experience crew working together can paint the apartment in 4 hours.

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: