Institution: জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় (JKKNIU) Exam: গ ইউনিট || জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় || 2012
Topic: Arithmetic Mathematics (পাটিগণিত), Subject: Mathematics (সাধারণ গণিত)

Best Answer Explained in Below-:

To understand why the correct answer is 'D) ১.৮৫২', it's important to know the relationship between nautical miles and kilometers. A nautical mile is a unit of measurement used primarily in maritime and air navigation, defined as precisely 1,852 meters. This measurement is based on the circumference of the Earth, making it particularly useful for navigation over water and in the sky where precise distances are crucial.

When converting nautical miles to kilometers, the conversion factor is straightforward: 1 nautical mile equals 1.852 kilometers. Therefore, if you were to calculate the value of 1 nautical mile in kilometers, you simply obtain 1.852 kilometers as a result.

Looking at the options provided, '১.৮৫২' clearly corresponds to the accurate conversion, confirming it as the correct choice. The other options—১.৮০, ১.৯০, and ১.৬০—do not accurately represent the conversion and therefore are not correct. This is essential knowledge for anyone involved in navigation, as accurate distance measurement is critical for safety and precision at sea and in the air.