If the length of a rectangle is increased by 20% and the width is decreased by 20%, then the area is :
A. decreases by 20%
B. decreases by 4%
C. stays the same
D. increased bty 10%
সঠিক উত্তরঃ
B.
decreases by 4%
Explanation:
Related Questions (Any University/Year)
- Fifteen percent of the people in Chittagong have unlisted phone numbers. If you select 300 names at random from the phone directory, what is the expected number of people who will have an unlisted phone unmber?
- একটি সংখ্যার বর্গ তার বর্গমূলের চেয়ে ১৪ বেশি হলে সংখ্যাটি :
- Three time the present age of a father is equal to eight times the present age of his son. Eight years hence the father will be twice as old as his son at that time. What are their present ages?
- If for integer x, 5
- If the diameter of a circle is doubled the area will be -
- আলমের বয়স কমলের বয়সের ৮০% হলে কমলের বয়স আলমের বয়সের----
- A football team plays 154 games in a year. If till July the team has won 40 and lost 20 games , how many of the remaining games the team must win to finish the year winning nearly 50% of the games ?
- পরপর তিনটি সংখ্যার গুণফল ১২০ হলে তাদের যোগফল কত?
- একটি ভগ্নাংশের লব ও হরের সমষ্টি ৫ এবং অন্তরফল ১ ভগ্নাংশটি কত?
- যদি x =y=2x এবং xyz=256 হয় তবে x এর মান কত?
- A is 30% more efficient than B . How much time will they, working together , take to-complete a job which A alone could have done in 23 days ?
- ৩ঃ ৫ কে শতকরায় প্রকাশ কত হয়?
- At a selling price of Tk 273 a book yields 30% profit. What selling price (in Taka) will yield the profit of 10%?
- The average weight of 6 persons of a group is 75 kg.If a person weighting 50 kg leaves the group, what will be the average weight of the group m?
- একটি সমকোণী ত্রিভুজের সমকোণ সংলগ্ন বাহুদ্বয় 4 সে.মি ও 3 সে.মি । অতিভুজের উপর অঙ্কিত বর্গক্ষেত্র ক্ষেত্রফল কত?
- বাইনারি সংখ্যা পদ্ধতিতে কতটি অঙ্ক ব্যবহৃত হয়?
- ১.১, .০১ ও .০০১১ এর সমষ্টি কত?
- একটি সরল রেখার উপর অঙ্কিত বর্গ ঐ সরলরেখার অর্ধেকের উপর অঙ্কিত বর্গ কত গুন ?
- A total of Tk. 1200 is deposited in two savings accounts for one year, one portion at 5% simple interest, and the rest at 7% simple interest. If Tk. 72 was earned in interest, how much was deposited at 5%?
- Sobuj bought three pieces of material. The first piece is 1 yard 2 feet 6 inches long, the second piece is 2 yards 1 feet 5 inches long, and the third piece is 4 yards 2 feet 7 inches long. If the cost of the material is Tk. 36 per yard, how much did Sobuj spent?
- A company owns some land and buildings for which the following details are relevant : Cost of land Taka 50,000; cost of building Taka 100,000, estimated life of building 20 years, estimated residual value of building Taka 2000; estimated residual value of land Taka 50,000. The company uses the straight line depreciation method. Which is the correct annual depreciation charge for this asset?
- The lest number by which 1470 must be divided to get a number which is a perfect square is:
- Mr. A is 5 years senior to Mr. B, Mr. B is 3 years senior to Mr. C, and Mr. C is 2 years junior to Mr. D in job experience . If Mr. D has 15 years job experience , how many years of experience does Mr. A possess ?
- ৫,১১,১৯,২৯,------ধারার পরের সংখ্যা কত?
- If (x2-4)(4/x-5)=0, then x=?
- কোন সংখ্যার চারগুণের সাথে ১ যোগ করলে যোগফল ঐ সংখ্যার ৩ গুণ হতে ৫ বেশি হবে?
- If x = 2y = 3z = 36 then the arithmetic mean of x, y, z is :
- 3x3+2x2-21x-20 রাশির একটি উৎপাদক হচ্ছে-
- A car passes Dhaka at 9:55 am and Gazipur at 10:15 am. Gazipur is 30 miles from Dhaka. What is the average speed of the car in miles per hour?
- Farhana earns Tk. 5.00 for every hour she works in a book store . Last week she worked for x hours. She purchased x kg of rice. Price of per kg rice is Tk. 12.00 she saved the remaining amount. Which expression below shows her savings?
- যদি ১ টাকা বিনিয়োগ করা হয় ৮% বাৎসরিক চক্রবৃদ্ধি সুদে, ৬ বছর শেষে মোট বিনিয়োগ হবে কত ?
- নিচের কোনটি দ্বারা বৃত্তের ক্ষেত্রফল নির্দেশ করে?
- A family had dinner in a restaurant and paid $30 for food. They also had to pay 9.5% sale tax and 10% for the tip. How much did the pay for the dinner ?
- In an examination 85% examinees passed in English. If total 75 examinees failed in English, then what is the total number of examinees
- In a certain country, a person is born every 7 seconds and a person dies in every 13 seconds. Therefore, the birth and death rates account for a population growth rate of one person every----
- In a 100m race, A beats B by 10m and C by 13m. In a race of 180m, B will beat C by
- A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work?
- একটি সরলরেখার উপর অঙ্কিত বর্গের ক্ষেত্রফল উক্ত সরলরেখার এক-চতুর্থাংশের ওপর অঙ্কিত বর্গের ক্ষেত্রফলের কতগুণ?
- x-1x=7 হলে, x3+1x3 এর মান কত?
- The sum of two numbers is 15 and the sum of their squares is 113. Find the numbers.
