Explanation

Let's consider the radius is r and therefore the Area will be πr².

Now the radius is increased by 4 times than the Area would be.

π(4r)² or the area would work to 16 times (4²=16).

Explanation

From the diagram let's take P as your initial position, first, you go 90-degree clockwise direction and reach Q, 

Then from Q you goes 180 degree anticlockwise and reaches R. 

From R you go again anticlockwise direction and reach S, Which is the final position and you facing is facing South-East 

Explanation

The study of the interaction between organisms and their surroundings is called ecology.

ecology that deals with the study of interactions between biotic and abiotic factors of the environment

Explanation

If the offence involves transportation of the victim into or out of Pakistan and it constitutes part of the transaction constituting the offence, the Federal Investigation Agency shall investigate the offence.

Explanation

We are given:

• A clock is placed on a table such that at 6:00 pm, the hour hand points to North-East.
• We need to find the direction the minute hand points at 9:15 pm.

At 6:00 pm, the clock is rotated, and the hour hand is pointing North-East. This means the clock's orientation is shifted by 45 degrees.

At 9:15 pm:

• The minute hand will be at the 3 o'clock position, which is 15 minutes past.
• Since the clock is rotated by 45 degrees, the minute hand will point in the South-East direction (shifted by 45 degrees from the usual position).

(A) South-East

Explanation

Professor tends to get bored sitting on the beach, watching the waves, getting sand in his swimsuit, and reading detective novels for a week.

it is a simple sentence.

because the above sentence consists of only one clause, with a single subject (Professor) and predicate.

Explanation

elect: چنا ہوا - چننا

Draw out, obtain, extract: نکالنا، حاصل کرنا، نکالنا

Explanation

The angular momentum of the body remains constant in a uniform circular motion.

Angular momentum is defined as:

The property of any rotating object given by moment of inertia times angular velocity.

Explanation

Total distance:

• Length of the train: 99m
• Length of the station: 231m
• Total distance = Length of the train + Length of the station = 99m + 231m = 330m

Total time: 11 seconds

Speed:

• Speed = Distance / Time
• Speed = 330m / 11s = 30 m/s

Now, we need to convert m/s to km/h:

• 1 m/s = 3.6 km/h

So, 30 m/s = 30 * 3.6 = 108 km/h

Therefore, the speed of the train is 108 km/h.

Explanation

All of these electromagnetic waves (whether radio, visible, or gamma) travel at the same speed.

They all travel at the 'speed of light' through a vacuum, that is at 3 × 10 8 m s-1