German silver is an alloy of?

Explanation
German Silver is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc

Explanation
Sir Isaac Pitman belonged to the UK, he was a teacher of the English language who developed the most widely used system of shorthand , known now as Pitman shorthand.        

Explanation
Answer: A The proportion in the sea is decreasing . Seawater is denser than river water, so ships suffer more damage.

Explanation
Answer: C Forests and trees contribute significantly to food security by helping maintain the environmental conditions required for agricultural production. They stabilize the soil, prevent erosion, increase the water storage capacity of the soil, and reduce air temperature and soil temperature .

Explanation
Qutub-ud-din Aibak died in an accident while he was playing polo. He fell from a horse and was severely injured He  Died  on 14 November 1210 (aged 60) in  Lahore Burial  in  Anarkali Bazaar, Lahore He was  born in 1150 in  Turkestan   Additional information: Qutub-ud-din Aibak  established  the first independent Turkish  Kingdom in India . The first Islamic state was  founded  in 1206 by  Qutb-ud-din Aibak  He became the  first  Sultan of Delhi from  1206 to 1210. After  Muhammad Ghori's  assassination in 1206. He  established  the Delhi Sultanate  (1206–1526), And  started  the Mamluk Dynasty  or  Salve Dynasty.

Explanation
Answer: MISPRIZE: Do not value  (something); underestimate. Devalue: Do not value  (something); underestimate. Erroneous: incorrect, wrong Covet: desire, want, or wish Despise:  or deep disgust, hate

Explanation
  Supervene: To occur as an interruption or change to an existing situation. Interfere: To intervene in a situation without invitation or necessity .  

Explanation
Answer: c FERVID: Very enthusiastic or passionate, especially overkill. Ardent: Very enthusiastic or passionate, especially overkill. Difficult: Hard to carry, or Hard Obstinate: Despite trying to convince you to change it, we stubbornly refuse to change your mind or the course of action you choose. Very difficult to change Delightful: Very charming or pleasant

Explanation
Answer: C ERSATZ: Manufactured or used as an alternative to others (of the product) and is usually inferior.  Artificial: Manufactured or used as an alternative to others (of the product) and is usually inferior.  Chaotic: In a condition of entire confusion and disorder. Impromptu: Without planning, organizing, rehearsals  Vague:   an  indefinite, uncertain, or unclear thing, character, or meaning

Explanation
Answer:  D Let the number be x 41 ​ ×31 ​ ×52 ​ ×x=15 Here x=15×30=450 So, 40% of 450 is =40/100×450 =180