Question
A submarine can navigate 112 km upstream and 130 km
downstream, and it takes a total of 8 hours and 6 minutes to complete this journey. Now, the task is to calculate the time required for the submarine to travel 64 km upstream and 195 km downstream, taking into account that the ratio of the submarine's speed in still water to the speed of the stream is 9:4.Solution
ATQ, Let, speed of Submarine in still water and speed of stream is ‘9a’ km/h and ‘4a’ km/h, respectively. Upstream speed = 9a – 4a = 5a km/h Downstream speed = 9a + 4a = 13a km/h So, 112/5a + 130/13a = 81/10 Or, (22.4 + 10) × 10/81 = a Or, a = 4 Upstream speed = 5 × 4 = 20 km/h Downstream speed = 13 × 4 = 52 km/h Desired time = (64/20) + (195/52) = 3.2 + 3.75 = 6 hrs 57 minutes
Statements: M = N; A < C < E; N > A
Conclusions:
I. E > N
II. M > C
Statements: U = R < M < Q < P; A > B > E < R < T; I < N = B > U > X
Conclusions:
I. P ≤ U
II. T > A
...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...
Statement: A = B ≥ C ≥ D, B < F ≤ K < M
Conclusions:
I. D < F
II. M < A
III. K > D
Statements: R < Y ≤ G = S ≥ T; L ≥ O = S < W ≤ U
Conclusions:
I. R < W
II. T ≤ L
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 : R < O ≤ P < Q; M < L ≤ N > O; S < Q ≤ K
Conclusions:
I. M < K
II. N > R
III. O < S
Which of the symbol should replace the question mark in the given expression in order to make the expression “M ≥ Q” as well as “O > K” defini...
Statements: A > C = B ≥ D ≥ F, B = G ≤ H < E
Conclusions:
I. A > G
II. H ≥ F
III. E > C
Which of the following symbols should be placed in the blank spaces respectively (in the same order from left to right) in order to complete the given e...
