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:
Only diameter is circle
Some diameter is triangle
No triangle is square
Conclusions:
I. All ci...
Statements:
Some laptops are printer.
All printer are camera.
Some camera are scanner.
Conclusions:
I. Some l...
In the questions given below, there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be...
Statement:
Some lehenga are saree.
Only a few suit are dhoti.
Only a few dhoti are hanky.
All lehenga are hanky....
In the question below there are three statements followed by two conclusions I and II. You have to take the three given statements to be true even if ...
In the question below there are three statements followed by two conclusions I and II. You have to take the three given statements to be true even if t...
In the question below there are three statements followed by three conclusions I, II and III. You have to take the four given statements to be true ev...
In the following questions below are given some statements followed by some conclusions based on those statements. Taking the given statements to be t...
- In the question below some statements are given followed by three conclusions I, II and III. You have to take the given statements to be true even if they ...
Statement:
Only Metal is Bronze
Some Metal are not Gold
All Gold are Diamond
Conclusion:
...
