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True

If circumference of two circles are equal, then their corresponding radii are equal. So, their areas will be equal.

Ratio of circumferences of two circles with radius r₁ and r₂ respectively 

= \(\frac{2πr_1}{2πr_2}\) = \(\frac{2}3\)

= \(\frac{r_1}{r_2}\) = \(\frac{2}3\)

Ratio of area = \(\frac{πr_1^2}{πr_2^2}\) = \(\frac{r_1^2}{r_2^2}\) = \(\frac{2^2}{3^2}\) = \(\frac{4}{9}\) = 4:9

Let radius of two circles be r₁ and r₂ then their circumferences will be 2πr₁ : 2πr₂

= r₁:r₂

But circumference ratio is given as 2 : 3

r₁: r₂=2:3

Ratio of areas = πr₂²: πr₂ ²

= (r_1/ r₂)^₂

= (2/3)²

=4/9

=4:9

Therefore, ratio of areas = 4:9

On rearranging 

x²+y-xy-x

Taking x common in the (x² + y) and -1 in (-x +y)

= x(x-y) -1(x-y)

Taking (x-y) common in both the terms

= (x-y) (x-1)

x²+y-xy-x = (x-y) (x-1)

Parents have a responsibility of upbringing of children in nuclear family.

The tranfer of characteristics from one generation to another is known as inheritance.

(b) Father, mother and their children

For taking care of those children whose parents are not alive, the government has established schools, orphan hostels for their arrangement of basic needs and providing facilities of food, shelter and education. Government has also arranged student’s stipend facilities for such children.

Salma’s father answered her that in cities there are small houses, in which a few family members can stay together. So, like this, the joint families are divided into nuclear femilies. In search of occupation or higher education, families are migrating from village to cities.

In such situation, without my mother, I feel very lonely.

(a) Elder brother-in-law

My mother recognizes me in a crowd by seeing my physique.

If Sanjana’s family had been a nuclear family, then, Sanjana’s father and Sanjana would have taken care of her mother.

(c) Grandfather (Dadaji)

There are 2 joint families in our neighbourhood.

Special excersie is necessary for cerebral palsy disease is True.

in a single family, only the father and  mother takes responsibility of upbringing children is True.

Every organisim has some Characteristics inherited form his or her parents is True.

1. (a joint) 

2. (houses) 

3. (Dr. Hargovind Khurana) 

4. (a nuclear family).

On pea plant.

Sanjana’s mother is ill.

Dr Hargovind khurana was awarded the Noble prize form his work on inheritance new charecteristics is True.

Gregor john Mendal has done a lot of experiments on the tomato tree is  False.

Grandparents, elder uncle, elder aunt, younger uncle and younger aunt, father and mother along with their children are the members of a joint family.

Gregor John Mendel

The transfer of characteristics from one generation to another is known as inheritance.

Children take good culture from families Members of the families maintain good relations Sanjiv Refresher with each other. All members of the family contribute towards the upbringing of the children with love and affection.

Dr. Hargovind Khurana has written many research papers regarding determination of inheritance of new characteristics. For his excellent work, he was awarded the Noble Prize.

The physical characteristics are inherited in the children from their parents and grandparents. These characters are known as hereditary characters.

If I were made a leader in such a camp, it would boost my confidence that I was trusted upon for the job. I would take up the responsibility duty fully.

The responsibilities of a group leader are challenging and of giving self-satisfaction.

Khondonbi would have sung loudly so that the group could listen and find them again easily. She may also be doing so to get over her fear.

(b) Uttarakhand

(i) Mountaineer Premlata Agarwal was born in Jugatlai, Jamshedpur (Jharkhand). 

(ii) She started mountaineering at the age of 35 years, with the guide and encouragement from Bachendri Pal. She became a member of an international team of the Everest expedition, started under the supervision of the Asian Trekking Company of Nepal. 

(iii) She achieved the honour of reaching the Mt Everest peak at the age of 48 years (20th May 2011). 

(iv) At the age of 50, she got a new achievement by getting victory over the Mt McKinley in Alaska of North America. She was the first Indian woman to climb this mountain.

Drain was dug to keep off insects, scorpion, snakes etc.

I feel very excited to climb up on a mountain. I can see high mountains all around. In between these are deep valleys. There are also many trees all around covered with flowers. The whole landscape is very beautiful and I feel as I have come to heaven. I want to climb higher.

Besides Republic day and Independence day, our national flag is hosted on other moments of national pride.

Last summer, when I went to Shimla, I crossed a mountains river using rope, sling and pitons as mentioned in the chapter. It was a very adventurous experience.

Yes, one of my friends went for tracking last summer. It was really adventurous. 

No, I have not tried to climb a mountain.

Bachendri Pal was born in Nakori village in Uttarakhand state. 

(i) She was a girl of courage and determination right from her childhood. At the age of 12 years, in a picnic, Bachendri climbed a mountain (13125 feet) just while playing. 

(ii) After getting the training from the Nehru Institute of Mountaineering, she participated in the mountaineering expedition of Gangotri mountain (21900 feet) and Rudugera mountain (19091 feet)

(iii) Because of her courage and enthusiasm, she was selected for the Everest Expedition team of 84 members. While climbing Everest (1984), there was a heavy landslide. Bachendri was badly hurt on the back of her head. All the ‘team members were also injured and they returned. But she did not give up. Due to her courage and strong determination, she became the first woman to climb the Mt Everest on 23rd May 1984

Yes, in Chanakya Puri, Delhi were embassies of different countries are based. I have seen the flag of many countries.

Sky diving, gliding, hot air ballooning, rowing in mountain rivers are some of the other activities that can be called adventurous.

(i) Mountains are full of dangerous rivers, deep valleys, irregular surfaces etc. To cross these is a very challenging task. 

(ii) It is not easy to climb on the steep slope of the mountains. It requires a lot of zeal and vigor. 

If I were to climb a mountain, I would have taken along with me food packets, water bottle, rope, hunter shoes, hook plastic sheet, diary, torch, towel, soap, wind cheater, whistle, glucose, jaggery, chana, snakes etc. Besides I would also carry a camera to catch the beautiful pictures.

Big holes were made in them to increase the viewing area and thus the soldiers peeping through it could have a better vigilance.

Bastions are made in such a manner that soldiers can peep through its holes safely and can have a better vantage point which is not possible in case of a straight flat wall.

About 1000 metres.

Bastions were made in the front wall to ensure security of the fort.

There are three palaces in the fort