Explanation

The Valdai Hills, are an upland region in the north-west of central European Russia .

Explanation

The header is a section of the document that appears in the top margin, while the footer is a section of the document that appears in the bottom margin.

Headers and footers generally contain information such as the page number, date, and document name.

Explanation

Pakistani Foreign Minister Shah Mahmood Qureshi said on Thursday the next meeting of the Organization of Islamic Cooperation (OIC) would be held on March 22 in Islamabad.

Explanation

 Amjadi Begum was the daughter of Azmat Ali Khan, who was a high official in Rampur State.

Explanation

Opium, narcotic drug obtained from the unripe seedpods of the opium poppy, Papaver somniferum.

Explanation

Washington DC is not one of the 50 states.

But it's an important part of the U.S.

The District of Columbia is our nation's capital.

Congress established the federal district from land belonging to the states of Maryland and Virginia in 1790.

Explanation

United Arab Emirates becomes the first Arab country to reach Mars.

The Emirates Mars mission, named the Hope probe, reached Mars'. 

Explanation

The demarcation line was published on 17 Aug 1947 upon partition of India

 Sir Cyril John Radcliffe,  was made the Chairman of two boundary commissions of Punjab and Bengal

Boundary Commission,created in July 1947

To recommend how the Punjab and Bengal regions of the Indian subcontinent were to be divided.

The borderline that separated India from Pakistan, known as the Radcliffe Line was revealed.

The Radcliffe line is spread through the Rann of Kutch in Gujarat

The commission—appointed by Lord Mountbatten

Consisted of four members from the Indian National Congress

 four from the Muslim League

Chaired by Sir Cyril Radcliffe.

Explanation

The Emirates Mars Mission is a United Arab Emirates Space Agency uncrewed space exploration mission to Mars.

The Hope probe was launched on 19 July 2020, and went into orbit around Mars on 9 February 2021

. The mission design, development, and operations are led by the Mohammed bin Rashid Space Centre.

Explanation

Let V1​ and V2​ be two volume of cubes.

l1​ and l2​ be edges of the two cubes.

We know that,

Volume of cube V=l3

So,

⇒  V2​V1​​=l23​l13​​

⇒  18​=(l2​l1​​)3             [ Given ]

∴  l2​l1​​=12​

∴  Ratio of their edges is 2:1.