Explanation

When using future perfect tense ("will have passed"), the clause with "when" takes present simple tense — not future.

So, the correct sentence is: "Three hours will have passed when the bell rings."

Explanation

We are told:

• Circumference of a circle = a

• Area of the circle = b

• And a = b

We know the formulas:

• Circumference:

  $$a = 2pi r$$
  

• Area:

  $$b=\pi r^2$$r=0orr=

Since $a = b$, set the formulas equal:

$$2pi r = pi r^2$$

Divide both sides by $pi$:

$$2r = r^2$$

Rearrange:

$$r^2 - 2r = 0 Rightarrow r(r - 2) = 0$$

So the solutions are:

r=0 or r=2

Explanation

"All will go to Karachi in April."

• "To" is used for direction or destination → go to Karachi.

• "In" is used for months, years, and longer periods → in April.

 So, the correct and natural usage is: to Karachi, in April.

Explanation

Institutions refer to long-standing practices or structures—leadership fits this description.

Passion for knowledge implies a strong desire to understand, making the phrase contextually accurate.

Institutions means ادارے

Passion means جذبہ

Explanation

The eye lens focuses light to form a real and inverted image on the retina.

The brain then processes this image and interprets it as upright.

Explanation

 The correct structure is “so + adjective + that” to show cause and effect.

"The question paper was so complicated that it was completely incomprehensible."

Explanation

 We are given:

• Red balls = 8

• Blue balls = 7

• Green balls = 6

Total balls = 8 + 7 + 6 = 21

We are asked to find the probability that the ball is neither red nor green.

That means we want the probability that the ball is blue.

Number of favorable outcomes = Number of blue balls = 7

Probability = (Favorable outcomes) / (Total outcomes)

= 7/31

=1/3
$$721=13frac{7}{21} = frac{1}{3}

Explanation

Lack of dogmatism (being open-minded and non-judgmental) is indeed important for good teamwork.

Motivation is crucial for effective collaboration with others.

Dogmatism means خود رائی

Motivation means حوصلہ افزائی

Explanation

 The phrase "reckon on" means to rely or depend on something or someone.

"Reckon with," "reckon at," and "reckon to" are not used in this context.

Making "on" the correct choice.

Explanation

 24 is split into two parts such that 7 times the first plus 5 times the second is 146.

Let the first part be 

x, then the second is 

7x+5(24−x)=146

7x+120−5x=146

2x=26⇒x=13