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For I: Speed of boat = 18 km/h Speed of stream = 7 km/h Speed in upstream = 18 – 7 = 11 km/h Speed in downstream = 18 + 7 = 25 km/h Total time = 90/11 + 210/25 = 8.18 + 8.4 = 16.58 hours So, I can’t be the answer. For II: Speed of boat = 18 km/h Speed of stream = 5 km/h Speed in upstream = 18 – 5 = 13 km/h Speed in downstream = 18 + 5 = 23 km/h Total time = 90/13 + 210/23 = 6.92 + 9.13 = 16.05 hours So, II can’t be the answer. For III: Speed of boat = 18 km/h Speed of stream = 9 km/h Speed in upstream = 18 – 9 = 9 km/h Speed in downstream = 18 + 9 = 27 km/h Total time = 90/9 + 210/27 = 10 + 7.78 = 17.78 hours So, III can’t be the answer. For IV: Speed of boat = 18 km/h Speed of stream = 3 km/h Speed in upstream = 18 – 3 = 15 km/h Speed in downstream = 18 + 3 = 21 km/h Total time = 90/15 + 210/21 = 6 + 10 = 16 hours So, IV can be the answer.
Statements: W > O > E ≤ N > P; L ≥ U; P > Q = R > U
Conclusions:
I. N > U
II. P > U
III. P < L
IV....
Statements: D ≤ R < E = F, W = B > A ≥ F
Conclusions:
I. E = W
II. D < B
Statements: T > S > R, L ≥ D < R, L ≤ O ≤ Z
Conclusions:
I. T > L
II. S > D
III. Z ≥ R
...Statements: P ≥ Q > R; S < T ≤ R; T > V
Conclusions:
I. P > T
II. V < Q
III. R > V
Statements:
I @ L © R * A $ M
Conclusions:
I. R * M
II. A % L
III. A % I
Statements: J < K, J < L, L > M
Conclusions: I. J < M II. L = J
...Statements: P = Q ≥ S > U = Y, U ≤ R < T ≤ W < V
Conclusions:
I. V > Y
II. P ≥ R
III. T < Q
Statements: I < Q = S = T ≤ U ≤ W < X > Y = V
Conclusions:
I. I > Y
II. W ≥ Q
III. T < V
...Statements: M > L = K ≥ H, V > G > M, U < N = H
Conclusions:
I. V > U
II. H < G
III. L ≥ V
Statements: B > K < Y, E > C ≥ O = Y
Conclusions:
I. C > B
II. E ≤ Y
III. E > K
IV. O ≥ K
...