Related Questions

একটি সরু উভোত্তল লেন্সের পৃষ্ঠ দুইটির বক্রতার ব্যাসার্ধ যথাক্রমে 20cm ও 40cm । লেন্সের 60cm সামনে লক্ষ্য বস্তু রাখলে 30cm পিছনে প্রতিবিম্ব সৃষ্টি হয়। লেন্সের উপাদানের প্রতিসরাঙ্ক কত?
ক 1.23
খ 0.45
গ 1.65
ঘ 1.5
একটি দ্বি-উত্তল অভিসারি লেন্সের প্রত্যেক পৃষ্ঠের বক্রতার ব্যাসার্ধ 30cm এবং গ্লাসের প্রতিসরাঙ্ক 1.50। লেন্সটির ফোকাস দৈর্ঘ্য কত হবে? (The radius of curvatures of both surfaces of a double convex lens are 30cm each and refractive index of glass is 1.50. What will be focal length of the lens?)
ক 15 cm
খ 30 cm
গ 45 cm
ঘ 60 cm
If the ratio of the areas of 2 squares is 2:1 , then the ratio of the perimeters of the squares is
ক 1 : 2
খ 2 : 1
The length of each side of square A is increased by 100 percent to make square B. Again the length of each side of square B is increased by 50 percent to make square C. By what percent is the area of square C greater than the sum of the areas of square A and B?
ক 75%
খ 80%
গ 85%
ঘ 90%
If the ratio of the area of two squares is 2: 1, then the ratio of the perimeters of the square is
ক 1: 2
খ 2: 1
The area of a rectangle R with width 4 feet is equal to the area of a square S, which has a perimeter of 24 feet. The perimeter of the rectangle R, in feet, is :
ক 9
খ 16
গ 24
ঘ 26
The area of a rectangle R with width 4 feet is equal to the area of a square S which has a perimeter of 24 feet. The perimeter of the rectangle R, in feet is :
ক 9
খ 16
গ 24
ঘ 26
If the area of rectangle R with length 4 feet is equal to the area of square S, which has a perimeter of 24 feet , then the perimeter of rectangle R equals -
ক 9 Feet
খ 16 Feet
গ 24 Feet
ঘ 26 Feet
The area of a rectangular R with width 4 feet is equal to the area of a square S which has a perimeter of 24 feet. The perimeter of the rectangular R, in feet, is :
ক 9
খ 16
গ 24
ঘ 26
The area of a rectangle R with width 4 ft is equal to the area of a square S , which has a perimeter of 24 ft. the perimeter of the rectangle R, in feet, is __
ক 9
খ 16
গ 24
ঘ 26

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