Subject
Bank Exam
Topic
বাংলাদেশ ব্যাংক (সহকারী পরিচালক) - ২৮.১০.২০২২
Two small circular parks of diameter 16 meter and 12 meter are to be replaced by a bigger circular park. What would be the radius of this new park, if the new park has to occupy the same space as the two small parks?
Two small circular parks of diameter 16 meter and 12 meter are to be replaced by a bigger circular park. What would be the radius of this new park, if the new park has to occupy the same space as the two small parks?
ক)
20 meterখ)
15 meterগ)
10 meterঘ)
100 meterExplanation
এখানে , ১ম পার্কটির ব্যাস 16 মি ব্যাসার্ধ r₁=16/2 =8 মি ২য় পার্কটির ব্যাস =12 মিটার ব্যাসার্ধ r₂ =12/2 =6 মি পার্কদ্বয়ের ক্ষেত্রফল =πr₁²+πr₂² =π×8²+π×6² =π×64+π×36 =64π+36π =100π মনে করি , নতুন পার্কটির ব্যাসার্ধ =R " " =πR² প্রশ্নমতে , πR²=100π বা,R²=100 বা, R=10² বা, R=10 মিRelated questions
(10)2is how many times of (0.01)3?A passenger paid 50% customs duty on accompanied baggage items. He paid another 20% sales tax on the total value of the items plus the custom duty paid. The total custom duty and sales tax is Tk. 350. what is the value of the item custom duty and sales tax?An amount of money is invested in a savings account for two years. It increased by Tk. 52.50 in two years. after annual compounding at the rate of 10% per year. What is the amount invested initially?ক্রিয়া পদের সাথে সম্বন্ধযুক্ত পদকে কী বলে?The angles of a triangle are in the proportion of 1 : 2 : 3 and the length of the smallest side is 1 cm. what is the length of the longest side of the triangle?'নন্দিনী' এর প্রতিশব্দ কি?A square room has a square carpet symmetrically placed in it. This leaves an uncovered area of 9 meter2. The area of the whole room is 25 meter2. What is the length of the one side of the carpet?'খোদা + আই' কোন প্রত্যয়?