Question
Pipe ‘A’ can fill a tank in 27 hours. Pipe ‘B’
can empty it in 54 hours. If both are opened simultaneously, in how many hours will 66.67% of the tank be filled?Solution
Let the capacity of the tank be 108 litres. So, efficiency of pipe ‘A’ = 108 ÷ A = 4 litres/hour And efficiency of pipe ‘B’ = 108 ÷ B = 2 litres/hour So, combined efficiency of both pipes = 4 – 2 = 2 litres/hour So, time taken to fill 66% of the tank = (108 × 0.67) ÷ 2 = 72 ÷ 2 = 36 hours
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No pen is a cover.
No cover is a page.
All pages are stickers.
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I. At least some pages are ...
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Only plates are cups.
Some plates are saucer.
No saucer is spoon.
Conclusion:
I. No spoon is cup.
...
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No status is a menu.
All titles are status.
Conclusions: All menus being tools is a possibili...
Statement : Some minerals are ores.
Some ores are woods.
All woods are acids.
No acids is a metal.
Conclusion : I. Some ...
Statement:
Only a few A are B
Only a few B are C
Conclusion:
I. Some A are C
II. No A is C
...Statements:
N < J; S = M; J ≥ S; P > M
Conclusions:
I. M ≤ J
II. S < P
III. N > S
In the question below some statements are given followed by two conclusions I and II. You have to take the given statements to be true even if they see...
Statement:
All Pens are pencil.
Only Pencils are Laptop.
Only Pens are Mobile.
Only Pencils are Book.
Conclusion :...
Statements-:
All Child are Students
No Student is Teacher
Only Staff are Teacher
Conclusions-:
I. Some Childs are Teacher
II. Some Staff are child.
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