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ATQ, Ratio of time taken by the submarine to cover the same distance in downstream and upstream = 4:8 = 1:2 So, ratio of upstream speed to downstream speed, of the boat = 1:2 (Since, distance covered is same therefore, ratio of speeds will be inverse of the ratio of time taken) Let the upstream speed of the submarine be 'a' km/h So, downstream speed of the Submarine = a × (2/1) = '2a' km/h ATQ; Speed of Submarine in still water = {(upstream speed + downstream speed)/2} So, {(2a + a)/2} = 12 Or, 3a = 24 So, a = 8 So, speed of the stream = speed of Submarine in still water - upstream speed = 12 - 8 = 4 km/h
Prevent a person from having or using something.
In the following question there is a related pair of words given. Each pair is followed by four other pairs of words. Choose the pair from the given opt...
Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No subst...
In each of the following questions, three out of four words given have the same meaning. Mark the number as your answer which is different in meaning fr...
What is the term for a person who believes that the pursuit of pleasure is the highest good?
Apex
A. Their four-hour match on Centre Court was an apex .
B. Tinted photographs were an apex substitute for colour.
C. The man...
Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No subst...
a stopping of an activity for an agreed amount of time
She tried to cajole her little brother into eating his vegetables by making silly faces and promising him dessert afterwards.
Select the option that can be used as a one-word-substitute for the given group of words.
The study of the origin and development of languages i...
