Explanation

To find the average wage per day:

Total daily wages:

Male workers: 20 × Rs. 25 = Rs. 500

Female workers: 15 × Rs. 20 = Rs. 300

Teen workers: 5 × Rs. 8 = Rs. 40

Total daily wages = Rs. 500 + Rs. 300 + Rs. 40 = Rs. 840

Total number of workers = 20 + 15 + 5 = 40

Average wage per day = Total daily wages / Total number of workers

= Rs. 840 / 40

= Rs. 21

Explanation

Let's denote the two numbers as x and y, where x is the smaller number.

Given:

x + y = 16 ... (1)

xy = 63 ... (2)

From (1), y = 16 - x. Substituting into (2):

x(16 - x) = 63

16x - x² = 63

x² - 16x + 63 = 0

Factoring the quadratic equation:

(x - 7)(x - 9) = 0

x = 7 or x = 9

Since x is the smaller number, x = 7.

Explanation

Direct: "I am going out tonight," Kaunain said.

I → she

am going → was going (present continuous → past continuous)

tonight → that night

So,

Indirect: Kaunain said that she was going out that night.

Explanation

Let's denote the three consecutive even numbers as x, x + 2, and x + 4.

Given:

x + (x + 2) + (x + 4) = 72

Combine like terms:

3x + 6 = 72

Subtract 6 from both sides:

3x = 66

Divide by 3:

x = 22

The smallest number is 22.

Explanation

A QR Code reader scans and sends data into the computer or mobile device.

Since it inputs information, it is classified as an input device.

Explanation

Chotiari Dam is another name for Baqar Lake.

It is also known as the "Jungle of Lakes".

It is a prominent feature of the Chotiari reservoir, which is an artificial water reservoir in the Sanghar district of Sindh, Pakistan.

The reservoir is fed by the Nara Canal.

Explanation

Direct: The secretary said, "Is Mr. Hyder in his office?"

It’s a yes/no question, so:

"said" becomes enquired

The question is changed to a statement structure

Present tense is becomes past was

Use if or whether for indirect questions

So,

Indirect: The secretary enquired if Mr. Hyder was in his office.

Explanation

This is a yes/no interrogative sentence in direct speech.

Direct:

The salesman said to me, "Are you interested in the scheme?"

Rules for indirect speech:

"said to" becomes asked (since it's a question)

The question form is changed to a statement form

"Are" becomes was

Use if or whether for yes/no questions

So,

Indirect: The salesman asked me if I was interested in the scheme.

Explanation

The original sentence is in simple past tense ("landed"), so the passive form also uses simple past: "was landed."

The object "the plane" becomes the subject in passive voice, followed by "was landed" and agent "by the pilot."

Explanation

The question is in present perfect tense ("Have you received..."), so passive form becomes "Has the prize been received?"

In passive voice, the object "the prize" becomes the subject, and "have you received" changes to "has been received."