A. 20π
B. 4π√5
C. 4π√3
D. 2π√5
E. 2π√3
সঠিক উত্তরঃ
B.
4π√5
Explanation:

Related Questions (Any University/Year)
- একটি বহু নির্বাচনী প্রশ্নমালায় ১০০ টি প্রশ্ন আছে। প্রতি প্রশ্নের ৪ টি বিকল্প উত্তর আছে। পরীক্ষার্থী ২০ টি প্রশ্নের উত্তর সঠিকভাবে দেয়। বাকি প্রশ্নগুলো অনুমান করে উত্তর দেয়। পরীক্ষার্থী ঐ পরীক্ষায় কত নম্বর পেয়েছিল?
- In a flight of 600 km , an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by \(200~km/hr\) and the time of flight consequently increased by 30 minutes. The duration of the flight was:
- A scientist needs a 10% saline solution for an experiment .In his closet ,he finds a 20 ounce bottle of 25% saline solution.How many ounces of pure water should he add to the mixture to produce the correct saline solution?
- Nakir and Sabir is twin brother. Their combined age now is equal to their father's age. After 10 years
- If \(x/z\) is more than \(y/z\), then \(y = ?\)
- The smallest of three consecutive even integers is 8 less than three times the largest. What is the largest of these integers?
- If P and Q are positive integers, which CANNOT be the greatest common divisor of P and Q?
- A straight fence is to be constructed from posts 6 inches wide and separated by lengths of chain 5 feet long. If a certain fence begins and ends with a post, which of the following could not be the length of the fence in feet? ( 12 inches = 1 foot)
- If a, b and c are 3 consecutive integers in that order, which of the following has the lowest value?
- ০.০০১ x ১০০০ = =?
- A man spent exactly $2.50 on 3¢, 6¢ and 10¢ stamps. If he bought 10 3¢ stamps and twice as many 6¢ stamps as 10¢ times, how many 10¢ stamps did he buy?
- যদি, \(\sqrt{\sqrt{\sqrt{3x}}}=\sqrt[4]{2x}\) তাহলে, x এর সবচেয়ে বড় সম্ভাব্য মান কোনটি?
- The HCF of two numbers is 23 and the other two factors of their LCM are 13 and 14. The larger of the two number is
- An error 2% in excess is made white measuring the side of a square. The percentage of error in the calculated area of the square is:
- If a man's weekly salary is Tk. P and he saves Tk. M, what faction of his weekly salary does he spend?
- The population of City X is 40% percent of the population of City Y. The population of City X is what percent of the total population of city X and City y together?
- The greatest possible value of C is how much greater than the smallest possible value of D?
- X sells a product of Y and makes a profit of 25%. Y sells it to Z at a loss of 20%. If Z buys it for tk. 140 what price X paid for it?
- Ages of three persons are now in the proportion of 2:3:4 and in five years from now, the proportion will be 5:7:9. What is the present age of the youngest person?
- x কে ৭ দিয়ে ভাগ করলে ভাগশেষ হয় ১। যদি y কে ৭ দিয়ে ভাগ করা হয় তাহলে ভাগশেষ হয় ২। তাহলে, x + y কে ৭ দিয়ে ভাগ করলে ভাগশেষ কত হবে?
- The average age of a husband, wife and their child 3 years ago was 27 years and the average age of the wife and the child 5 years ago was 20 years. What is the present age of the husband?
- এক মণ ধানে চাল ও তুষের অনুপাত ১৪ঃ৬ হলে, এতে শতকরা কি পরিমান চাল আছে?
- In a class of 200 students, forty percent are girls. Twenty-five percent of the boys and 10 percent of the girls signed up for a tour to Cox's Bazaar. What percent of the class signed up for the tour?
- When x is divided by 7, the remainder is 6.Which of the following must be an even number ?
- A restaurant meal cost $35.50 and there was no tax. If the tip was more than 10 percent but less than 15 percent of the cost of the meal, then the total amount paid must have been between:
