Explanation

• Sound travels fastest in diamond, with a speed of approximately 12,000 meters per second (m/s).
• This is because diamond has a very high stiffness and density, which allows sound waves to propagate quickly through the material.

The speeds of sound in different materials:

• Air: 343 m/s
• Water: 1433 m/s
• Wood: 3300-3600 m/s
• Brick: 4176 m/s
• Steel: 6100 m/s
• Diamond: 12000 m/s

Explanation

Find how many man-days to complete the road:

70*35 = 2450 man-days

Let d = days required for 40 men to do it.

40d = 2450

d=402450​=61.25

Explanation

To find the number, you can set up an equation:

7% of x = 42

To solve for x, you can convert the percentage to a decimal by dividing by 100:

0.07x = 42

Then, divide both sides by 0.07:

x = 42 / 0.07

x = 600

So, the number whose 7% is 42 is 600!

Explanation

"Wealthy" is an adjective.

It describes someone who has a lot of wealth or is rich.

Wealthy means دولت مند

Explanation

Pakistan, officially the Islamic Republic of Pakistan, is a country in South Asia.

Pakistan is the world's fifth-most populous country.

Pakistan is the world's second-largest Muslim population.

Pakistan is the 33rd-largest country by area.

The capital of Pakistan is: Islamabad

the Currency of Pakistan is: the Pakistani rupee

Explanation

Invertebrates are animals that do not have a backbone or spinal column. This group includes:

• Insects
• Arachnids (like spiders and scorpions)
• Crustaceans (like crabs and lobsters)
• Mollusks (like squids and octopuses)
• Echinoderms (like starfish and sea urchins)
• Worms

Explanation

After the party's foundation in 1885, Womesh Chunder Bonnerjee became its first president.

**HISTORY**

Womesh Chandra Bannerjee was an Indian barrister.

He was a co-founder and the first president of Indian National Congress.

He Born: December 29, 1844, Kolkata, India

he Died: July 21, 1906, Bedford Park, London, United Kingdom

Explanation

Honey has natural antibacterial properties and low moisture, preventing spoilage.

Archaeologists have found edible honey in ancient Egyptian tombs, thousands of years old.

Explanation

PCR (Polymerase Chain Reaction) is the most sensitive and accurate test for detecting viral genetic material.

It can detect even very low amounts of virus in early stages of infection.

Explanation

Duration of Tofaan e Noah around 6 months.

Hazrat Noah lived for 950 years.

 About People were with him in the boat. 80 people 

After the how many years of Hazrat Adam A.S the event of Toofan-e-Noah occurred. 2242