Explanation

Vestigial organs are organs, tissues or cells in a body

Which are no more functional the way they were in their ancestral form of the trait.

Explanation

A can do the work in 4 hours, so A's work rate is 1/4 of the work per hour.

B and C can do the work in 3 hours, so their combined work rate is 1/3 of the work per hour.

A and C can do the work in 2 hours, so their combined work rate is 1/2 of the work per hour.

Now, let's find B's work rate:

B and C's combined work rate is 1/3 of the work per hour, and A and C's combined work rate is 1/2 of the work per hour. Since A's work rate is 1/4 of the work per hour, C's work rate can be found by subtracting A's work rate from the combined work rate of A and C: (1/2 - 1/4) = 1/4 of the work per hour. So, C's work rate is also 1/4 of the work per hour.

Now, we can find B's work rate by subtracting C's work rate from the combined work rate of B and C: (1/3 - 1/4) = 1/12 of the work per hour.

Since B's work rate is 1/12 of the work per hour, B alone will take 12 hours to complete the work.

Explanation

Imam Shafii was born in the Gazza in the year 150 AH, the same year that Imam Abu Hanifa died.

Explanation

The sentence should read: "My father was so poor that he could not buy us food."

This sentence is a common idiomatic expression used to describe someone's extreme poverty.

The phrase "so poor" is an intensifier, emphasizing the extent of the poverty, and the clause "that he could not buy us food" explains the severity of the situation.

Explanation

Explanation

which city of Pakistan is called city of Engineers

Explanation

The main electronic component used in first-generation counterparts was Vacuum Tubes and Valves

Leo is called the first-generation computer

First-generation (1940 - 1956)  vacuum tubes as a major piece of technology. 

The ENIAC is an example of 1st generation computer.

The time span of first-generation electronic computers was 1943 to 1959

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Second generation (1956 - 1963) use of transistors.

Third generation (1964 - 1971)  use of Integrated circuits.

Fourth generation (1972 - 2010) use of the microprocessor

The fifth generation (2010 to present) use Artificial intelligence

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ND7-5-2023

Explanation

Vexillology is the study of flags.

 Vexillology comes from the Latin word vexilla "little sail" for flag.

Vexillology means جھنڈوں کا مطالعہ

Explanation

The density of the world population as a whole is 38 persons per sq. km.

Asia has the highest density of 108 persons per square km

It comprises 60 percent of the population of the planet.

about 30% of Earth's total land area and 8% of Earth's total surface area

It is the most densely populated continent on the earth.

the total area of the Asia continent: is 44.58 million km²

while

Europe with 101 persons per square km ranks second.

Explanation