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  • A tap T1 can fill a tank in 20 minutes and tap T2 can empty the tank in 12 minutes. If the tank is already full and both the taps are opened

A tap T1 can fill a tank in 20 minutes and tap T2 can empty the tank in 12 minutes. If the tank is already full and both the taps are opened

Answers (1)

Tap 1 fills a tank in 20 minutes

Tap 1 fills part of tank in 1 minute = 

Tap 2 fills a tank in 12 minutes

Tap 2 fills part of tank in 1 minute = 

If they both are opened together , So, Part of tank filled in 1 minute:

= 

=                           

So, They both filled   part of tank in minute = 1

So, They both filled  whole tank in minute = 

                                                                      = 

                                                                      = 

Hence the tank will be full in 7.5 minutes if both taps are opened together.

Posted by

Satyajeet Kumar

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