Three pipes a and b and c can fill a swimming pool in 6 hours. after working on it together for 2 hours, c is closed and a and b finish the remaing work in 7 hours. find the time taken by alone to fill the swimming pool.

The pipe C alone can fill the tank in 14 hours .

Step-by-step explanation:

Given as :

The three pipes a , b , c can fill the pipes in 6 hours

They work for 2 hours

After that c pipe is close and a , b finish remaining work

Now, According to question

In 1 hour pipes ( a + b + c ) fill of the tank

∴ In 2 hour pipes ( a + b + c ) fill =   of the tank

Remaining ( 1 -  ) =  part is filled by pipes a and b in 7 hours

∴ The whole tank is filled by a and b in 7 × =   hours

∴ In 1 hour pipes A and b fill the tank in hours

∴ In 1 hour pipes C alone can fill the tank in - hours

Or,  In 1 hour pipes C alone can fill the tank in =  

Or, In 1 hour pipes C alone can fill the tank in 14 hours

Hence The pipe C alone can fill the tank in 14 hours . Answer

answer: its because of life

step-by-step explanation: i dont know

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.