Correct Answer: 2.8 cm

Solution : Given:
$\triangle$ABC is similar to $\triangle$DEF.
So, $\frac{\text{Area of ABC}}{\text{Area of DEF}}=\frac{BC^2}{EF^2}$
⇒ $\frac{9}{16}=\frac{2.1^2}{EF^2}$
⇒ $EF^2=\frac{4.41×16}{9}$
⇒ $EF=\sqrt{\frac{4.41×16}{9}}$
$\therefore EF =2.8$ cm
Hence, the correct answer is 2.8 cm.

Correct Answer:

Solution : The correct answer is 1/3 rd.

Deserts cover around 33% of the earth's land area, while mountains cover 24%. 

Antarctic desert is the largest cold desert and Sahara desert is the largest hot desert in the World.

The hottest desert in the world is Lut desert

Correct Answer: South

Solution : Firstly, we will draw the diagram as per the given instructions –

Now, we have to find the direction of Rahul from the starting point.

Here, A is the starting point and E is the endpoint.

So, Rahul is in the south direction from the

Correct Answer: Both statements A and B are correct

Solution : The correct option is Both statements A and B are correct.

Sexually transmitted diseases (STDs) are infections that are transferred from one person to another through sexual contact. HIV (Human Immunodeficiency Virus), HPV (Human Papillomavirus), and Hepatitis B virus

Correct Answer: BNQQDBS

Solution : Given:
SYSTEM is written as RXRSDL.

Subtract one from the place values of the letters of the given words to get the code​​​​​​.
SYSTEM is written as RXRSDL –
S – 1 = R; Y – 1 = X; S – 1 = R; T

Correct Answer: 37

Solution : The average of 20 numbers = 35
The sum of 20 numbers = 20 × 35 = 700
Now add 85 and subtract 45,
Correct sum = 700 – 45 + 85 = 740
$\therefore$ Correct average = $\frac{740}{20}$ = 37
Hence, the correct answer

Correct Answer: 1787

Solution : The correct answer is 1787.

Antoine Lavoisier published "Methods of Chemical Nomenclature" in the year 1787. This work included the rules for naming chemical compounds, and many of these nomenclature rules are still in use today. Lavoisier's contributions to the systematization of chemical nomenclature and

Correct Answer: Khudiram Bose

Solution : The correct answer is Khudiram Bose.

In the Muzaffarpur area of modern-day Bihar, on April 30, 1908, Khudiram Bose and Prafulla Chaki detonated a bomb on the carriage of Calcutta's Chief Presidency Magistrate, Douglas Kingsford. Two of the women who were in the carriage

Correct Answer: Odissi

Solution : The correct option is Odissi.

The famous dance personality Kelucharan Mohapatra is associated with the classical Indian dance form of Odissi. He was a highly influential figure in the world of Odissi and is considered one of the pioneers in revitalising and popularising this ancient

Correct Answer: Penicillin

Solution : The correct option is - Penicillin

When researching Staphylococcus bacteria that he noticed growing in one of his unclean petri cultures, Alexander Fleming discovered the first antibiotic, penicillin, in 1928. Ernest Chain and Howard Florey, who shared the Nobel Prize for their discovery in 1945,