Question
Pipe ‘A’ can fill a tank in 16 hours whereas leak
‘A’ can empty it in 20 hours. If they both operate along with pipe ‘B’, then the given tank gets filled in 8 hours. How much time is needed to fill the given tank if pipe ‘B’ and leak ‘A’ work together?Solution
Let the capacity of the tank be 80 litres {LCM (16 and 20)} Efficiency of pipe ‘A’ = 80 ÷ 16 = 5 litres/hour Efficiency of leak ‘A’ = 80 ÷ 20 = 4 litres/hour Combined efficiency of pipe ‘A’ and leak ‘A’ = 5 – 4 = 1 litre/hour Combined efficiency of pipe ‘A’, ‘B’ and leak ‘A’ = 80 ÷ 8 = 10 units/hour Efficiency of pipe ‘B’ = 10 – 1 = 9 units/hour Time taken by pipe ‘B’ and leak ‘A’ to fill the tank = 80 ÷ (9 – 4) = 16 hours
In the question, assuming the given statements to be true, find which of the conclusion (s) among given two conclusions is/are definitely true and then...
Statements: Z > Y ≥ X; I < N ≤ L; F < I > D > Z
Conclusions:
I. L > F
II. X < N
III. Y < I
Statement: H ≥ U < T; C < M; M = T > O
Conclusions:
I. H > O
II. C > U
III. T > C
- Statements: P > Q ≥ R < S; T ≤ R > U ≥ V
Conclusions:
I. S > V
II. U < P
III. Q > T In which of the following expressions will the expression ‘M ≥ N ' and ‘Q < O’ be definitely true?
What should come in the place of question mark, in the given expressions to make ‘T > Y’ always true?
R > T = U ≥ V ? W ≥ X =Y
Statements: O > Q < R > P = U ≥ S > T ≥ N
Conclusion
I: S < R
II: U > N
In the question, assuming the given statements to be true, find which of the conclusion (s) among given two conclusions is/are definitely true and then...
In the question, assuming the given statements to be true, find which of the conclusion (s) among given three conclusions is /are definitely true and t...
Statements: B > C; D > E = F < G ≥ H; C > I = D
Conclusions:
I. B < E
II. G > E
III. I < B
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