Question
The ratio of the speed of boat in upstream to speed of
boat in downstream is 7:9. If the boat can cover a total of 49 km upstream and 81 km downstream in 4 hours, then find the time taken by the boat to cover 128 km in still water.Solution
Let speed of boat in upstream and downstream be ‘7x’ km/h and ‘9x’ km/h respectively. 49/7x + 81/9x = 4 7/x + 9/x = 4 16 = 4x x = 4 Speed of boat in still water = (7x + 9x)/2 = 8x = 8 × 4 = 32 km/h Desired time = 128/32 = 4 hours
Statements: Z % Y; X # W; U % V; W & V; Y @ X
Conclusions:Â Â Â Â Â
I. U @ X Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ...
Which among the following symbols should replace the question mark [?] (in the same order from left to right) in the given expression in order to make ...
Which among the following symbols should replace the question mark [?] (in the same order from left to right) in the given expression in order to make b...
Statement: E ≤ F; E ≤ H; F = P; H < S
Conclusion:
I. S ≤ F
II. P ≥ S
In the following question, a relationship between different elements is shown in the statements followed by two conclusions I and II. Assuming the state...
Which of the following symbols should replace the sign ($) and (*) respectively in the given expression in order to make the expression A ≥ J and P ...
Relationship between different elements is shown in the statements. Find if the conclusions also follow or not.
Statements: J ≥ Q = W ≥ D <...
Statements: N $ J, J % O, OÂ * Â P, P # X
Conclusions :
I. X % J
II. N $ P
III. J % X
IV. X % O
Statements: P = Q = R > S > T > Z; U > R < V < W > X
Conclusions:
I. W > Z
II. R < W
III. R < X
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...
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