Question Discussion & Solution

CONCEPT:

Nuclear reactor:

• It is a device in which a nuclear reaction is initiated, maintained, and controlled.
• It works on the principle of controlled chain reaction and provides energy at a constant rate.

EXPLANATION:

• Uranium is used as a fuel in a nuclear reactor.
• The Process is illustrated by the diagram, where the mass difference between the reactants (Uranium) and the products (Krypton and Barium) is converted into energy.

Five friends: A, C, F, U and Z.

1) F is shorter than A who is shorter than Z.

F < A < Z

2) C is shorter than F but not as shorter as U.

This means U is shorter than C.

U < C < F

Combining 1) and 2), we get:

U < C < F < A < Z

After reading statement and conclusions we decide that -

i) All women are scientists.→ False 

ii) All scientists are women.→ False

Hence, option 4 is the correct answer.

The correct answer is Pooja Kadian.

• Pooja Kadian was the first Indian to receive the title of world champion in Wushu in 2017.

Key Points

• Pooja Kadian won the gold in women’s 75kg category.
• Pooja defeated Evgeniya Stepanova of Russia in the final.
• The event was held at Kazan in Russia.
• Praveen Kumar was the first Indian man to win a gold medal at the Wushu World Championships.
• Praveen defeated Philippines' Russel Diaz in the 48kg category. 

Additional Information

• Wushu Sanda is a martial art which combines full-contact kickboxing, including close-range punches and kicks, with wrestling, takedowns, throws, sweeps and kicks catches.

Let Rahul’s age be x.

Let Rita’s age be y.

Let Ekta’s age be z.

⇒ x = y + 3

⇒ y = 4z – 3

⇒ x = 4z – 3 + 3

⇒ x = 4z

⇒ x/z = 4

⇒ x ∶ z = 4 ∶ 1