Explanation

The heart is the central organ of the blood circulatory system, responsible for pumping blood throughout the body.

It circulates oxygen, nutrients, and waste products via arteries and veins.

Explanation

"Who" is a relative pronoun that refers back to "the boy".

It introduces the relative clause "who scored a fifty."

Explanation

Original sentence is in future simple tense (active voice):

Subject + will + base verb + object

→ The team will celebrate their victory.

Passive voice structure for future simple:

Object + will be + past participle + by + subject

→ The victory will be celebrated by the team tomorrow.

Explanation

The formula for the sum of the first n natural numbers is:

S(n) = n(n + 1) / 2

Given S(100) = 5050, let's calculate S(200):

S(200) = 200(200 + 1) / 2

= 200 * 201 / 2

= 100 * 201

= 20100

Explanation

The sentence is in past perfect continuous tense, and it remains the same in indirect speech.

Pronouns are adjusted appropriately: I → he.

No tense change is needed after "said" when past perfect continuous is used.

Final sentence: Hyder said that he had been gardening for two hours.

Explanation

Let's break it down:

(x + y + z) / 3 = 15

x + y + z = 45

(y + z + w) / 3 = 16

y + z + w = 48

Given w = 19:

y + z + 19 = 48

y + z = 29

Now, substitute y + z in the first equation:

x + 29 = 45

x = 16

Explanation

Let's calculate each option:

1/9 of 504 = 504 / 9 = 56

1/4 of 236 = 236 / 4 = 59

1/3 of 741 = 741 / 3 = 247

1/16 of 1028 = 1028 / 16 = 64.25

Comparing the results:

56, 59, 247, 64.25

The greatest number is 247, which corresponds to 1/3 of 741.

Explanation

Green tea contains antioxidants and natural compounds like catechins that aid digestion and reduce bloating.

It also promotes a healthy gut by improving metabolism and supporting gut bacteria.

Explanation

"Owing to" means because of, and it is used to state the reason for something.

Correct sentence: Owing to illness, he could not attend the party.

Explanation

Let's break it down:

Original price per kg = Rs. 200

Increased price per kg = 200 + (25% of 200) = 200 + 50 = Rs. 250

To keep expenditure the same, let's assume original consumption is 1 kg, and new consumption is x kg.

Original expenditure = 200 * 1 = Rs. 200

New expenditure = 250 * x = Rs. 200

x = 200 / 250 = 0.8 kg

Percentage decrease in consumption = ((1 - 0.8) / 1) * 100% = 20%