Question Discussion & Solution

The correct answer is 36.

• In the year 2019-20, 36 Gram Panchayats in Rajasthan are proposed to introduce the 'Zero Budget Natural Agriculture Scheme'.

Key Points

• Rajasthan 'Zero Budget Natural Agriculture Scheme'
  • ​Rajasthan is focusing on ZBNF since State Budget 2019-20.
  • Consequently, it has been decided that Zero Budget Natural Farming will be taken up in 36 Gram Panchayat of Banswara, Tonk and Sirohi at the cost of 10 crores, benefiting 20 thousand farmers.

​Additional Information

• Zero Budget Natural Farming in India 
  • ​It was originally promoted by agriculturist Subhash Palekar, who developed it in the mid-1990s.
  • It is an alternative to the Green Revolution's methods that are driven by chemical fertilizers and pesticides and intensive irrigation. It is a unique model that relies on agroecology.
  • It aims to bring down the cost of production to nearly zero and return to a pre-green revolution style of farming.

Given : Cobbler : Shoes – Cobbler mends our shoes.

Electrician : Screw – Screw is a tool used by electricians.

Carpenter : Jig – Jig is a tool used by carpenters.

Mechanic : Car – Mechanic mends our cars.

Manager : Office – Manager is a superior person who handles the administrative work of an office.

The correct answer is Archimedes' principle.

Concept:

Archimedes principle:

the principle of Archimedes states “When a body is immersed in a liquid, an upward thrust, equal to the weight of the liquid displaced, acts on it.”

Thus, when a solid is fully immersed in a liquid, it loses weight which is equal to the weight of the liquid it displaces.

i.e., \(Apperent\;weight = actual\;weight - buoyant\;force = mg - \rho gV\)

where m is mass of the object, ρ is the density of the fluid

Hence if there is no gravity, there is no Upward Thrust.

The upward force applied to the object is called the buoyant force.

Here,

ρ = density of liquid

g = acceleration due to gravity

V = volume of liquid displaced by the object

Explanation:

Archimedes’ principle, a physical law of buoyancy states that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force the magnitude of which is equal to the weight of the fluid displaced by the body.

Hence floating of the ship is based on Archimedes principle:

The study of individual organisms and their interaction with the environment is known as autecology.

Key Points 

• Ecology is the study of the interaction of organisms with their environment.
• Synecology and autecology is the branch of ecology.
• Synecology is the study of a group of organisms and their relation to the environment.
• Community ecology or synecology is the study of the interactions between species in communities on many spatial and temporal scales, including the distribution, structure, abundance, demography, and interactions between coexisting populations.
• For example, the study of the entire grassland ecosystem. 

According to the question:

Since 7 is the part of the men as well as the women.

So, 7 men are women.

Hence, 7 is the correct answer. 

Note: If in the question asked "how many men are only women", then the answer, in this case, would be 0.