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AMIT GILL

· started a discussion

· 1 Months ago

wrong (Question:472602.0)

in statement two pipe together open not one

Question:

Two pipes x and y can fill a cistern in  3712    minutes and 45 minutes respectively both pipe are opened the cistern will be filled just in half an hour, if the pipe y is turned off after–

Options:
A)

6 minutes

B)

7 minutes

C)

9 minutes

D)

8 minutes

Solution:

Ans: (c)

  

So, pipe x worked for 30 minutes 

It filled = 30×6 = 180 units 

Capacity left = 225 – 180 = 45 units 

So, this left capacity most be filled by B

B must have filled it in  =455=9    minutes

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