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An athlete runs 200 meters race in 24 seconds. His speed is

 

Option: 1

20 km/hr


Option: 2

24 km/hr


Option: 3

28.5 km/hr


Option: 4

30 km/hr


28.5

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Posted by

Guru G

The distance between two stations A and B is 440 km. A train starts at 4 p.m. from A and move towards B at an average speed of 40 km/hr. Another train starts B at 5 p.m. and moves towards A at an average speed of 60 km/hr. How far from A will the two trains meet and at what time?

Option: 1

200,8 p.m.


Option: 2

300,9 p.m.


Option: 3

200,9 p.m.


Option: 4

300,8 p.m.


200,9

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Posted by

Guru G

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PQ is a tunnel. A dog sits at the distance of 5/ 11 of PQ from P. The train whistle coming from any end of the tunnel would make the dog run. If a train approaches P and dog runs towards P the train would hit the dog at P. If the dog runs towards Q instead, it would hit the dog at Q. Find ratio of speed of train and dog?

 

Option: 1

5:2


Option: 2

16:5


Option: 3

11:1


Option: 4

34:3


Option 3 - 11:1

########            P____5_____¶______6_____Q

"¶" is the dog located inside the tunnel PQ and #####... is a train approaching to it. 

Case 1 - Dog decides to reach point P 

Distance covered by Dog - 5 parts and train reaches at P

Case 2 - Dog decides to run towards point Q

At the time train reaches to point P, the dog covers 5 parts in direction of Q. Now the left out part covered by dog will be 1 part towards Q .

At the time dog covers 1 part and reaches Q, train covers whole 11 parts of tunnel and reaches from P to Q. 

So, 11 part of train is eual to the 1 part covered by the dog to reach Q. 

Ratio of their speeds - Train:Dog = 11:1  

 

 

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Posted by

Vaibhavi Gupta

In a situation where a country’s government exercises complete control over its territory, makes its laws, and has no foreign authority dicating its internal affairs, what term best describes the status of this country?

Option: 1

Autonomous

 

Option: 2

Independent

 

 

Option: 3

Subjugated

 

 

Option: 4

Alliance

 

A country is known to be independent when it governs itself without any interference from any foreign power.

When it is able to make its own law, control its own territory and can handle internal matters independently. Independent means full sovereignty.

Hence, the correct answer is option 2) Independent

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Posted by

Divya Sharma

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In a nation where citizens elect representatives to make decisions on their behalf, and the head of state is not a hereditary monarch but a public official chosen through elections, what form of government does this nation have?

Option: 1

Monarchy

 

Option: 2

Oligarchy

 

 

Option: 3

Democracy

 

 

Option: 4

Republic

 

A republic government is a form of government where the citizens are allowed to elect representatives to make laws and decisions. This means that the head of state is not a hereditary monarch but an elected official. In such a type of government structure, the power lies with the people. This ensures the leadership through public choice rather than royal lineage.

Hence, the correct answer is option 4) Republic

 

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Posted by

Divya Sharma

Which term from the Preamble of the Indian Constitution aligns with the idea of promoting economic equality, similar to the situation in “Harmonia”?

Option: 1

Sovereign

 

Option: 2

Socialist

 

 

Option: 3

Secular

 

 

Option: 4

Democratic

 

Socialist in the preamble of the Indian Constitution means the idea of promoting economic equality. This would mean reducing the gap between rich and poor, and making sure a fair distribution of wealth and resources. This is similar to the situation described in Harmonia.

Hence, the correct answer is option 2) Socialist

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Posted by

Divya Sharma

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Situation: Imagine you are planning a community event to celebrate the founding principles of the United States. You want to include elements that reflect the Preamble. Which option best aligns with the principles outlined in the Preamble of the U.S. Constitution?

Option: 1

A charity fundraiser to support local schools and education initiatives.

 

Option: 2

A fireworks display to commemorate the nation’s history and achievements.

 

 

Option: 3

A debate competition on current political issues.

 

 

Option: 4

A military parade showcasing the strength and capabilities of the armed forces

 

The Goals of the Preamble of the US constitution are -

Promoting the general welfare

Securing the blessings of liberty

Establishment of justice

Hence, the correct answer is option 1) A charity fundraiser to support local schools and education initiatives.

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Posted by

Divya Sharma

A massless string connects two pulley of masses ' 2 \mathrm{~kg}' and '1 \mathrm{~kg}' respectively as shown in the figure.

The heavier pulley is fixed and free to rotate about its central axis while the other is free to rotate as well as translate. Find the acceleration of the lower pulley if the system was released from the rest. [Given, g=10 \mathrm{~m} / \mathrm{s}^2]

Option: 1

\frac{4}{3} \mathrm{~gm} / \mathrm{s}^2


Option: 2

\frac{3}{2} \mathrm{~gm} / \mathrm{s}^2


Option: 3

\frac{3}{4} \mathrm{~gm} / \mathrm{s}^2


Option: 4

\frac{2}{3} \mathrm{~gm} / \mathrm{s}^2


3/4gm/s2

 

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Posted by

Guru G

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The following is the biochemical pathway for purple pigment production in flowers of sweet pea:

Colorless precursor 1 —- Allele A—->  Colorless precursor 2 —--- Allele B—---> Purple pigment

Recessive mutation of either gene A or B leads to the formation of white flowers. A cross is made between two parents with the genotype: AaBb × aabb. Considering that the two genes are not linked, the phenotypes of the expected progenies are:

 

Option: 1

9 purple : 7 white


Option: 2

3 white : 1 purple


Option: 3

1 purple : 1 white


Option: 4

9 purple : 6 light purple : 1 white


3(white):1(purple)

In case of 'duplicate recessive epistasis homozygous recessive gene masks the other gene i.e., aa is epistatic to A or a || bb is epistatic to B or b

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Posted by

Riya

Calculate the acceleration of block m_1 of the following diagram. Assume all surfaces are frictionless . Here m1 = 100kg and m2 = 50kg

 

Option: 1

0.33m/s2


Option: 2

0.66m/s2


Option: 3

1m/s2


Option: 4

1.32m/s2


0.66m/s2

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Posted by

Guru G

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