Related Questions

কোন এক পার্কের একটি দোলনায় ঝুলতে লোহার তার ব্যবহার করা হয়েছে। কয়েকজন ছেলে-মেয়ে দোলনায় যখন দোল খাচ্ছিল তখন এক বাচ্চার অভিভাবক লক্ষ্য করেন যে, ফুলন তার 1 m থেকে বৃদ্ধি পেয়ে 1.01 m হয়েছে এবং তারটির ব্যাস হ্রাস পেয়েছে। পয়সনের অনুপাত 0.2 হলে দোলনার তারের ব্যাস কতখানি হ্রাস পায় ? (The iron wires have been used in a park to swing. When some children are swinging, the length of the wire increases from I m to 1.01 m whereas the diameter of the wire decreases which is noticed by a guardian. If Poisson's ratio is 0.2, then how much the diameter of the wire decreases?) 
ক 0.15%
খ 0.18%
গ 2.5%
ঘ 0.25%
ঙ 0.2%
Why have the incidents of flood risen in India recently?
ক Rise in annual rain
খ Deposition of silt in dams
গ Deforestation in drainage zone
ঘ None of the above
Where do all meteorological incidents occur?
ক Stratosphere
খ Troposphere
গ Ionosphere
ঘ Exosphere
If the side of a square decreases by 30%, then the area of the square decreases by :
ক 14%
খ 21%
গ 49%
ঘ 51%
Assume that the price of product Y decreases by 5% and the quantity supplied decreases by 2%. The coefficient of price elasticity of supply for product Y is:
ক Negative and therefore Y is an inferior product.
খ Less than one and therefore supply is-inelastic
গ More than-one and therefore supply is elastic,
ঘ Negative & supply curve is download slopping.
a chemial is mixed 30 ml mixed , 10 ml is acid , how much ml of acid must be mixed such that a 50/50 mixure of water and acid is attend if no additional water is added
ক 20
খ 10
গ 40
ঘ 30
How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?
ক 8
খ 6
গ 7
ঘ 9
The molecular mass of sulphuric acid is 98. If 49 g of the acid is dissolved in water to make one litre of solution, what will be the strength of the acid?
ক Two normal
খ One normal
গ 0.5 normal
ঘ Four normal
In a mixture of 30 liters, the ratio of acid and water is 7 : 3. How much more water is to be added to get a new mixture containing acid and water in the ratio of 3 : 7?
ক 30 liters
খ 25 liters
গ 40 liters
ঘ 35 liters
Out of 7,500 applications for a recruitment test, 1,500 failed to appear for the test. What percent of the total applicants did appear for the test ?
ক 25
খ 50
গ 75
ঘ 80

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