Question
A boat covers 315 km upstream in 7 hours and 525 km
downstream in 7 hours. Find the time taken by the boat to cover 420 km in still water.Solution
Upstream speed = 315 / 7 = 45 km/hDownstream speed = 525 / 7 = 75 km/hSpeed in still water = (45 + 75) / 2 = 60 km/hRequired time = 420 / 60 = 7 hours
Which of the following symbols should replace ‘@’ and ‘%’, (in the same order from left to right) in the given expression in such a manner that ...
Statements: A ≤ E, P < Q > X, E = P, Y ≥ Z = A
Conclusions:
I. Q > E
II. E < X
Which of the following expressions will be true if the expression ‘L ≥ M < N = O’ is definitely true?
Given statement shows the relation between different elements followed by two conclusions.
Statement: C1 < L1 > I2 = E1 ≥ N2 > T1
...
Statement: X=Y≤Z>T; T>Q ; X ≥R
I. Z≥R
II. R>Q
Statements: M ≤ N; O < R; O = N; S ≥ Q; N > S
Conclusions:
(i) Q < M
(ii) N ≥ Q
(iii) M > R
Statements: I ≥ J ≤ K = L ≤ M; G ≤ H < I; M ≤ N < O ≥ P
Conclusions:
I. M < H
II. N ≥ J
III. M ≥ H
Statement: C > S > F > B > L; I > B > T
Conclusion: I. I > L II. T < C
Statements: O < D ≤ T; C ≥ X = U; Y < Z = C > D
Conclusions:
I. U ≤ Z
II. O ≤ C
III. Y < D
Statements: G > L = V ≥ Z ≤ O = Q < K < N
Conclusions:
I. L ≥ Q
II. Z < N
