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Class 12th English

Directions for questions: Read the information carefully and answer the questions given below.

On the occasion of Janmasthmi, four persons – A1, A2, A3 and A4 bought certain dozens of bananas for their respective houses. Their wives also went to the market and bought bananas. Further it is known that

I. The wives are W1, W2, W3 and W4

II. A1 bought as many bananas as his wife, A2 bought twice as many as his wife, A3 bought three times as many as his wife, and A4 bought four times as his wife.

III. W1 bought 2 dozens bananas, W2 bought 3, W3 and W4 bought 4 and 5 dozens of bananas respectively.

IV. The fou

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Payal Gupta

Contributor-Level 10

Let us denote, the dozens of Bananas bought by A4's wife by a1, a2 by A3's wife, a3 by A2's wife and a4 by A1's wife. We prepare the table given below Bananas bought:

A1 = a₄ A1's wife = a₄

A2 = 2a₃ A2's wife = a₃

A3 = 3a₂ A3's wife = a₂

A4 = 4a₁ A4's wife = a₁

Where (a1, a2, a3, a4) is a rearrangement of (2, 3, 4, 5). Now, (a4 + 2a3 + 3a2 + 4a1) + (a4 + a3 + a2 + a1) = 44 4a1 + 3a2 + 2a3 + a4 = 44 – (2 + 3 + 4 + 5) = 30 …. (1) (Sum a1 + a2 +

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Class 12th Physics Electromagnetic Waves

A plane electromagnetic wave with frequency of 30 MHz travels in free space. At particular point in space and time, electric field is 6 V/m. The magnetic field at this pint will be x * 10^-⁸T. The value of x is_______.

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alok kumar singh

Contributor-Level 10

$B = \frac{E}{c} = \frac{6}{3 * 1 0^{8}} = 2 * 1 0^{- 8} T$

->x = 2

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Class 12th Chemistry

In the following sequence of reactions, the final product D is:

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Vishal Baghel

Contributor-Level 10

CrO₃ : mild oxidizing agent

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Class 12th Chemistry

The major product of the following reaction is

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Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

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Class 12th English

Six cities of India – Jammu, Kolkata, Lucknow, Mumbai, Nagpur and Orcha are connected by one way and two way highways as indicated in the diagram given below. The arrow head indicates the direction in which the traffic is allowed to flow. No other route is available except those given in the diagram.

What is the least possible number of cities, a person has to pass through, while travelling from Mumbai city to Lucknow city?

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Payal Gupta

Contributor-Level 10

Following are the possible ways from city Mumbai to city Lucknow.

I. Mumbai – Nagpur – Kolkata –Lucknow

II. Mumbai – Jammu – Orcha – Lucknow

III. Mumbai – Nagpur – Jammu – Orcha – Lucknow

The least possible number of cities is two.

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Class 12th English

For which of the following cities it is not possible for a person to start his journey from the city and pass through all the other cities and come back to the same city, without passing through any city more than once?

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Payal Gupta

Contributor-Level 10

A person can start and return the same city while passing through every city.

So, According to the given data option d is correct

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Class 12th English

In how many different ways can a person travel from Kolkata city to Nagpur city, without passing through any city more than once?

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Payal Gupta

Contributor-Level 10

The following are the possible ways:

I. Kolkata – Mumbai – Nagpur

II. Kolkata – Lucknow – Jammu – Nagpur – Mumbai

There are two possible ways.

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Class 12th English

Directions for questions: Read the information carefully and answer the questions given below.

In how many different ways, can a person travel from Nagpur city to Lucknow without passing through any city more than once?

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Payal Gupta

Contributor-Level 10

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Class 12th Physics

A square shaped wire with resistance of each side $3 Ω$ is bent to form a complete circle. The resistance between two diametrically opposite points of the circle in unit of $Ω$ will be________.