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Tank not empty Problem

Posted on by Daniel Dsouza

The Tank not empty Problem sent in by one of our readers is as shown below :)

Question :

Q):A water tank is two-fifth full. pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open,how long will it take to empty or fill the tank completely?
a)6min. to empty
b)6min. to fill
c)9min. to empty
d)9min. to fill

 

Solution : 

For the solution :) You can read the forum thread :)  –  http://aptitudeacademy.co.in/forum/index.php?topic=14.0

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Age Group Average Problem

Posted on by Daniel Dsouza

The Age Group Average Problem is as follows :

Question :

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find out how much younger is that new member ? :) 

solved aptitude problems

solved aptitude problems

 

 

 

 

 

 

 

 

 

 

Solution :

Now to solve this sum, there are many complicated ways :) But Ill show you the simplest one :)

We know that since there are 10 members, after 4 yrs each of them gets 4 yrs older. Hence the group combined, has aged 40 yrs. Hence,
If the new member has to keep the average the same as 4 yrs ago, he should be 40 yrs younger than the member he is replacing 😉

Hence the answer is 40 yrs 

 

Got a doubt ? :) Leave me a comment and Ill get back to you :)

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