Explanation

Downstream= x+y km/hr

And speed = distance/time

20km/2hr

10km/hr

Then x+y=10km/hr

or x = 10-y km/hr

Also

Downstream

x-y=4km/2hr

x-y=2km/hr

Putting value of x=10-y

10-y-y=2

y=4km/hr= speed of current

And x = 6km/hr= speed of boat

Explanation

A Multimedia database is a collection of related for multimedia data.

The multimedia data include one or more primary media data types such as text, images, audio and video.

AGM 24-12-2022

Explanation

Ctrl + X Cut selected items.

Ctrl + V Paste content from the clipboard.

Ctrl + A Select all content

Ctrl + P print active document or selected items

AGM 24-12-2022

Explanation

Cleopatra was the last active ruler of the Ptolemaic Kingdom of Egypt. As a member of the Ptolemaic dynasty, she was a descendant of its founder Ptolemy I Soter, a Macedonian Greek general and companion of Alexander the Great.

Explanation

Know is a verb.

Knew is the second form while known is the third form of Know.

Passive Voice = Object + is/am/are + third of verb + to + subject.

Active: She knows him.

Passive: He is known to her.

AGM 24-12-2022

Explanation

Syed Hassan Raza is a Pakistani diplomat and a former senior career foreign service officer. He served as the Special Secretary at Pakistan's Foreign Office, overseeing the Middle East, OIC & Legal divisions

Explanation

Catch fire means آگ لگنا

Caught is the second and third form of the verb Catch.

Explanation

The words like Future, Freedom, Generosity, Slavery are examples of Abstract Noun. 

AGM 24-12-2022

Explanation

 Content means the subject or ideas

Contents means the parts contained in books

AGM 24-12-2022

Explanation

A concrete noun is a noun that can be physically experienced through taste, touch, sight, hearing, or smell.

Book, pen, page etc. are examples of Concrete Noun. 

AGM 24-12-2022