Explanation

Speed of the two trains: 60 km/hr and 90 km/hr

If train cross each other, then effective speed = 60 + 90 = 150 km/hr

Length of first train = 1.10 km or 1100 m

Length of second train = 0.9 km or = 900 m

formula

Speed = Distance/Time

⇒ 150 × (5/18) = 2000/Time

⇒ 125/3 = 2000/Time

⇒ Time = 2000 × (3/125)

∴ Time = 48 seconds.

Relative speed = 60 + 90 = 150 km/hr. = 150 x 5/18 = 125/3 m/sec. Distance covered = 1.10 + 0.9 = 2 km = 2000 m. Required time = 2000 x 3/125 = 48 sec.

Explanation

Speed of train relative to jogger = (45−9) km/hr = 36 km/hr

=(36×185​)m/sec

= 10 m/sec.

Distance to be covered = (240+120)m=360m.

∴ Time taken =(10360​)sec

=36sec.

Explanation

C is a general-purpose computer programming language.

It was created in the 1970s by Dennis Ritchie and remains.

Explanation

A byte is a unit of digital information.

that most commonly consists of eight bits.

Explanation

A field is also known as a column

that stores the same type of data and hence can be called a category of data.

Explanation

The third stage in designing a database is analyzing our tables more closely and creating a between tables.

Explanation

Primary Key - a field containing a value that uniquely identifies each record in a table.

Explanation

You create such a relationship by defining a third table that is called a junction table. 

Explanation

In one-to-many relationship, the table in ‘one’ side is called Parent.

ایک سے کئی رشتے میں، 'ایک' طرف کی میز کو والدین کہتے ہیں۔

Explanation

In MS Word, the header or footer is printed by default on each page.

You can update it in the Header and Footer menu.

The bottom margin of each page is known as a footer.