Explanation

Tense: Present continuous ("is cooking")

Passive form: is being + past participle

So, "is cooking" becomes "is being cooked"

Final sentence: Food is being cooked by my mother.

Explanation

Let's calculate Ahsan's share:

Hyder's share = 40% of 500,000

= 0.4 × 500,000

= 200,000

Ahsan's share = 20% of Hyder's share

= 0.2 × 200,000

= 40,000

Explanation

Lungs are the main organs of the respiratory system, responsible for gas exchange.

They absorb oxygen and release carbon dioxide during breathing.

Explanation

Charlie Chaplin was born in London, England in 1889.

He gained global fame through silent films.

He later worked in the USA, but his nationality was British.

The Tramp was British actor Charlie Chaplin's most memorable on-screen character and an icon in world cinema during the era of silent film.

The Tramp is also the title of a silent film starring Chaplin, which Chaplin wrote and directed in 1915.

Explanation

Let's assume the attendance on the three days is 2x, 5x, and 13x, respectively.

Total revenue = (15 × 2x) + (7.5 × 5x) + (2.5 × 13x)

= 30x + 37.5x + 32.5x

= 100x

Total attendance = 2x + 5x + 13x

= 20x

Average charge per person = Total revenue / Total attendance

= 100x / 20x

= 5

Explanation

This is a universal truth (wind as a renewable energy source), so the present tense "is" remains unchanged in indirect speech.

The reporting verb "said" does not require "told" unless followed by an object.

So the correct narration: The teacher said that the wind is a renewable energy source.

Explanation

Let's calculate their combined work rate:

Ali's rate = 1 work / 4 days = 1/4 work per day

Hyder's rate = 1 work / 12 days = 1/12 work per day

Combined rate = 1/4 + 1/12

= 3/12 + 1/12

= 4/12

= 1/3 work per day

Time to complete the work together = 1 / (1/3)

= 3 days

Explanation

Hepatitis is a liver disease that directly affects the digestive system, especially liver function.

It impairs digestion and metabolism of nutrients due to liver inflammation.

Explanation

Let's assume Aslam purchased x bananas and y oranges.

The total cost is 8x + 7y = 30.

We need to find a combination of x and y that satisfies the equation.

If x = 2 and y = 2:

8(2) + 7(2) = 16 + 14 = 30

This combination works, so Aslam purchased 2 bananas and 2 oranges.

Explanation

Income on the first day = Re. 1.
Income on the 2nd day = Rs. (1x2) = Rs. 21.
Income on the 3rd day = Rs. (21 x 2) = Rs. 22 and so on. Thus, Income on the rath day = Rs. 2n-1.
Therefore Income on the 10th day = Rs. 29.