Explanation

• Celsius and Fahrenheit are two temperature scales.
• At one special point, both scales show the same value.
• This happens when temperature is −40.
• So, −40°C = −40°F.

Last verified on 11-04-2026

Explanation

• Solids → fastest sound speed
• Liquids → medium speed
• Gases → slowest speed

Steel is more elastic and dense.

• Steel ≈ 5000 m/s
• Air ≈ 332 m/s
• Water ≈ 1500 m/s

Last verified on 11-04-2026

Explanation

• The Indus Waters Treaty was signed on September 19, 1960, in Karachi.
• It was signed between Pakistan (President Ayub Khan) and India (Prime Minister Jawaharlal Nehru).
• It was brokered by the World Bank.

It became effective on April 1, 1960.

• Western Rivers (given to Pakistan): Indus, Jhelum, Chenab
• Eastern Rivers (given to India): Ravi, Beas, Sutlej

Last verified on 30-03-2026

Explanation

Last updated on 08-04-2026

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Explanation

World Health Day is observed on 7th April every year.

Theme 2025: Healthier beginnings, hopeful futures

Theme 2026: Together for health. Stand with science

Additional Information: 

World Health Organization (WHO) was founded on 7 April 1948.

WHO has its headquarters in Geneva, Switzerland. 

Explanation

As of 2026, the current president of Cuba is Miguel Díaz-Canel.

He succeeded Raul Castro, who was the president from 2008 to 2018.

He has been in office since October 10, 2019.

He is also the First Secretary of the Communist Party of Cuba.

Last updated on 08-04-2026

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Explanation

$1 + tan^2 x = sec^2 x$
sec x = √(1 + (3/5)²) = √(34/25) = √34/5
cos x = 1/sec x = 5/√34

Explanation

Explanation

Number of boys = 8% of 40

= (8/100) × 40 = 3.2 ≈ 3 (nearest whole number)

Explanation

• UNHRC stands for: United Nations Human Rights Council
• Formation: 15 March 2006
• 47 members
• Elected for staggered three-year terms on a regional group basis
• Headquarters: Geneva in Switzerland.