Explanation

• The largest undersea railway tunnel is constructed between France & England
• ***
• The largest undersea railway tunnel constructed between France & England is the Channel Tunnel 
  
• This tunnel was built in 1988.
• The length of this tunnel is 31.4 Miles.
• ***
• The project to build the undersea leg between England and France began in earnest in 1986.
• But as work progressed, the owner, Eurotunnel, and the Anglo-French consortium responsible for the design and construction
  

Explanation

Ghulam Muhammad Barrage is also known as Kotri Barrage.

It was inaugurated by the third governor general of Pakistan General Ghulam Muhammad Malik.

 The barrage was completed in 1955.

It is used to control water flow in the Indus for irrigation and flood control purposes.

Opened: 1955

Length: 1,600m 

Explanation

• The actual working area of the Computer's Microsoft Excel is a worksheet.
• The title bar in MS Excel displays the name of the workbook.
• The main window in a computer spreadsheet is called a workbook.
  

Explanation

Machine language, or machine code, is a low-level language comprised of binary digits (1 and 2).

Since computers are digital devices, they only recognize binary data.

Explanation

• E-mail stands for: Electronic Mail
• Father of E-mail: Ray Tomlinson
• First E-mail sent: 1971
• @ is used to divide an email into: two parts
• SMTP helps to send: E-mails
• SMTP stands for: Simple Mail Transfer Protocol
• Received email is saved: inbox
• Sent email is saved in: sent box
• Maximum attachment size in Yahoo Email: 25 MB
• G-mail stands: Google Mail
• Email spam also called: junk email
• To close email account click: sign out
• To create new E-mail: Sign Up
• Email hacking means: Illegal access to open email accounts of others
• Junk email is also called: Spam 
•  At sign (@): always a part of email address
• Sending an E-mail is similar to: writing a letter
• A allows us to access our e-mail from anywhere: Webmail interface 
• Bookmark:  is associated with Internet E-mail

Explanation

x^2 > y^2

This implies that the absolute value of x is greater than the absolute value of y.

Explanation

Since 3 is a solution, plug x = 3 into the equation:

3(3)^2 + (k - 1)(3) + 9 = 0

27 + 3k - 3 + 9 = 0

3k + 33 = 0

3k = -33

k = -11

Explanation

Initial ratio: Boys:Girls = 8:5

After 22 more girls join:

Boys = 8x, Girls = 5x + 22 (where x is a constant)

Total students = 286 + 22 = 308

8x + 5x + 22 = 308

13x = 286

x = 22

Boys = 8x = 176

Girls = 5x + 22 = 132

New ratio = Boys:Girls = 176:132 = 4:3 (after simplification)

Explanation

Total heads = 200

Total legs = 580

Calculation:

Let, number of pigeons be x and number of rabbits be y

According to the question,

x + y = 200     ...i)

2x + 4y = 580

⇒ x + 2y = 290     ...ii)

From (i) and (ii) we get,

y = 90

⇒ x = 200 – 90 = 110

∴ There are 110 pigeons in the zoo

Explanation