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Q:

A man went downstream for 28 km in a motor boat and immediately returned. It took the man twice as long to make the return trip. If the speed of the river flow were twice as high, the trip downstream and back would take 672 minutes. Find the speed of the boat in still water and the speed of the river flow.

A) 12 km/hr, 3 km/hr	B) 9 km/hr, 3 km/hr
C) 8 km/hr, 2 km/hr	D) 9 km/hr, 6 km/hr

Answer & Explanation Answer: B) 9 km/hr, 3 km/hr

Explanation:

Let the speed of the boat = p kmph

Let the speed of the river flow = q kmph

From the given data,

$2 x \frac{28}{p + q} = \frac{28}{p - q}$

=> 56p - 56q -28p - 28q = 0

=> 28p = 84q

=> p = 3q.

Now, given that if

$\frac{28}{3 q + 2 q} + \frac{28}{3 q - 2 q} = \frac{672}{60} = > \frac{28}{5 q} + \frac{28}{q} = \frac{672}{60} = > q = 3 kmph = > x = 3 q = 9 kmph$

Hence, the speed of the boat = p kmph = 9 kmph and the speed of the river flow = q kmph = 3 kmph.

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Filed Under: Boats and Streams
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Q:

What has 3 feet but cannot walk?

Answer

We know that 1 yard = 3 feet.

A yardstick which is used for measurement has 3 feet long but it cannot walk.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
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Q:

Tally package is developed by

A) Tally Solutions	B) Coral Softwares
C) Vedika Softwares	D) Peutronics

Answer & Explanation Answer: A) Tally Solutions

Explanation:

Tally package is developed by Tally Solutions.

Tally Solutions, then known as Peutronics, was co-founded in 1986 by Shyam Sunder Goenka and his son Bharat Goenka.

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Filed Under: Bank Interview
Exam Prep: AIEEE , Bank Exams , CAT
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Q:

The main goal for farmers in 1900 was to

A) Force the railroads to lower freight rates	B) Enable them to pay back their loans more easily
C) Hold on to political and economic power.	D) voters greater direct participation in government

Answer & Explanation Answer: C) Hold on to political and economic power.

Explanation:

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Filed Under: Indian History
Exam Prep: AIEEE , Bank Exams
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Q:

The average salinity of seawater is

A) 35%	B) 3.5%
C) 3%	D) 2.5%

Answer & Explanation Answer: B) 3.5%

Explanation:

Seawater or salt water is water from a sea or ocean.

On average, seawater in the world's oceans has a salinity of approximately 3.5% or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts dissolved in it.

Hence, The average salinity of seawater is 3.5%.

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Filed Under: General Awareness
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Q:

Which type of molecule is CF4?

A) nonpolar, with a symmetrical distribution of charge	B) polar, with an asymmetrical distribution of charge
C) nonpolar, with an asymmetrical distribution of charge	D) polar, with a symmetrical distribution of charge

Answer & Explanation Answer: A) nonpolar, with a symmetrical distribution of charge

Explanation:

CF4 is tetrahedral.

Since the four 'F' atoms have the same electronegativity values, there is no bias in electron distribution toward any one.

Therefore, electron/charge distribution is symmetrical, which also means that the molecule is nonpolar.

Hence, CF4 is nonpolar molecule with a symmetrical distribution of charge.

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Filed Under: Chemistry
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Q:

Localized area of pus formation in the lungs is

A) Pulmonary embolism	B) Pulmonary abscess
C) Pleurisy	D) Pulmonary edema

Answer & Explanation Answer: B) Pulmonary abscess

Explanation:

Pulmonary abscess is a type of liquefactive necrosis of the lung tissue.

localized_area_of_pus_formation_in_the_lungs1537941339.jpg image

Hence, Localized area of pus formation in the lungs is Pulmonary abscess.

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Filed Under: Biology
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Q:

GUI stands for

A) Graphical Universal Interface	B) Graph Use Interface
C) Graphical Unique Interface	D) Graphical User Interface

Answer & Explanation Answer: D) Graphical User Interface

Explanation:

GUI stands for Graphical User Interface.

A Graphical User Interface is a computer interface that allows users to interact with a device through graphical elements such as pictures and animations, as opposed to text-based commands.

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Filed Under: Computer
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