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Q:

In what time would a cistern be filled by three pipes which diameters are 2 cm, 3 cm and 4 cm running together, when the largest alone can fill it is 58 minutes? The amount of water flowing in each pipe is proportional to the square of its diameter.

A) 26 min B) 32 min
C) 36 min D) 42 min
 
Answer & Explanation Answer: B) 32 min

Explanation:

Given that the diameters of the three pipes are 2 cm, 3 cm and 4 cm

From the given data,

Amount of water from three pipes is 4 units, 9 units and 16 units.

Let the capacity of cistern be 'p' units.

∴ p/58 = 16

⇒ p = 928 units.

 

In 1 minute, quantity to be filled by 3 pipes = 29 units

∴ Total time required = 928/29 = 32 minutes.

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Filed Under: Pipes and Cistern
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Q:

Find the odd man out of the following series?

6, 8, 5, 10, 4, 14

A) 8 B) 10
C) 4 D) 5
 
Answer & Explanation Answer: C) 4

Explanation:

The given number series is 6, 8, 5, 10, 4, 14

6

6 + 2 = 8

8 - 3 = 5

5 + 5 = 10

10 - 7 = 3

3 + 11 = 14

...

 

Hence, the odd man in the given series is 4.

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Q:

The difference between present ages of Ravali and Swarna is 9 years. After 7 years, Ravali’s age is twice of Swarna’s age. What will be Ravali’s age after 4 years?

A) 15 yrs B) 16 yrs
C) 20 yrs D) 21 yrs
 
Answer & Explanation Answer: A) 15 yrs

Explanation:

Let the present age of Ravali = x

=> Swarna's present age = x - 9

From the given data,

x + 7 = 2(x - 9 + 7)

=> x = 11 yrs

Required Ravali's age after 4 years = 11 + 4 = 15 yrs.

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Filed Under: Problems on Ages
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Q:

Glycolysis is the conversion of

A) Glucose to pyruvate B) Glucose to proteins
C) Pyruvate to glucose D) All of the above
 
Answer & Explanation Answer: A) Glucose to pyruvate

Explanation:

Glycolysis is the metabolic process of converting 1 molecule of glucose to 2 molecules of pyruvate through a series of 10 enzyme catalyzed reactions.

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Filed Under: Chemistry
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Q:

The gas usually filled in the electric bulb is

A) Hydrogen B) Oxygen
C) Nitrogen D) Carbon dioxide
 
Answer & Explanation Answer: C) Nitrogen

Explanation:

The gas usually filled in the electric bulb is Nitrogen.

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Filed Under: General Science
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Q:

The ancient goal of astrology was to 

A) make a more accurate model of the universe B) predict human events
C) understand the origin of Earth D) predict the passing of the seasons
 
Answer & Explanation Answer: B) predict human events

Explanation:

The ancient goal of astrology was to predict human events.

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Filed Under: Indian History
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Q:

Polypeptides are assembled from

A) Ribosomes B) Chromosomes
C) Aminoacids D) None of the above
 
Answer & Explanation Answer: C) Aminoacids

Explanation:

Polypeptides are assembled from Aminoacids.

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Q:

An example of an extensive property of matter is

A) Volume B) Mass
C) Density D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Any properties that are dependent on the amount of matter are called as extensive properties of matter.


Examples are :: Mass, Volume, Density (M/V),...

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Filed Under: Chemistry
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