Two pipes A and B can fill a cistern in `27 1/2` minutes and 35 minutes respectively. Both pipes are opened. The cistern will be filled in just 25 minutes, if the pipe B is turned off after:
Let the pipe B be turned off after x minutes Then, Part filled by (A + B) in x minutes + Part filled by A in (25 - x) minutes = 1 x(2/55 - 1/35) + (25 - x) x 2/55 = 1 x/35 = 1 - 50/55 x = 35/11 or 3(2/11) minutes
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No bull is a goat.
Some g...
Statements: Some papers are copies.
No copy is a diary.
Some diary are cardboard.
Conclusions:I. No diary is papers.
II. S...
Statements:
Some plates are spoons.
All spoons are cups.
No cup is a fork.
Conclusions:
I. Some plates are ...
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Some TVs are laptops.
Some laptops are computers.
All computers are mobiles.
All mobiles are radios.
...
Statements :
All Beaks are Wings.
Only a few Wings are Cock.
Some Cock are not Hens.
Conclusions :
I. Some Beak...
Statements:
Some diamonds are golds.
Some golds are marbles.
Conclusions:
I. Some diamonds are marbles.
II. S...
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All needles are ropes.
Some ropes are buckets.
All buckets are trees.
Conclusions:I. Some ...
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be tru...
Statements: All school are college.
Some college are not institutions.
All institutions are university.
Conclusions: I. some ...
Conclusions:
I.No Charger is Socket.
II.Some Plug being Battery is a Possibility
