Question
Two pipes A and B can fill a tank in 15 hours and 20
hours, respectively. If both pipes are opened together and then pipe A is closed after 5 hours, how long will it take for pipe B to fill the tank?Solution
Work done by pipe A in one hour = 1/15. Work done by pipe B in one hour = 1/20. In 5 hours, work done by A = 5 * (1/15) = 1/3. Remaining work = 1 - 1/3 = 2/3. Now, only pipe B is working. Work done by B in one hour = 1/20. Time taken by B to fill the remaining tank = (2/3) / (1/20) – 5 hours = (2/3) * 20 -5 = 40/3 -5 hours ≈ 8.33 hours. Correct option: d) 8.3 hours
Statements: B > A = D ≥ C = I ≥ H > E > F > G
Conclusions:
I. C ≥ E
II. E > C
III. A ≥ DStatements: 1 > 2 ≥ 3 = 4 < 5 ≤ 6; 7 ≥ 8 = 9 < 4 = 10 ≥ 11
Conclusions:
I. 2 ≥ 10
II. 3 < 7
III. 6 > 11
Statements:
L ≤ J ≤ C = N; W ≥ X > L
Conclusions:
I. J ≤ X
II. X ˃ W
In which of the following expressions the expression ‘Q ≤ N’ would hold definitely true?
Statement: E < N < Q = W = F ≥ U > A
Conclusion:
I. Q > A
II. E > F
Statements:
Only Ear is Eye.
No Hand is Ear.
Only a few Hands are Legs.
Conclusion:
I. Some Eyes can be Legs.
...
If “M % N # O © P @ S © T $ W” is true then which of the following is definitely not true?
(i) M # P
(ii) O © T
(iii) N #...
Statement: A > B < D = E < C < F > G ≥ J; D > H
Conclusions:
I. A > H
II. F > H
III. D > F
Statements: P > Q ≥ R > S; U ≥ T < S; V > U
Conclusions:
I. P > V
II. Q > T
III. P ≤ U
Statements: Q > M > Y < N = H ≥ S < V < R ≤ K
Conclusion
I: K > Y
II: N > S
