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Question
The population of a certain town increases by 50 percent every 50 years. If the population in 1950 was 810 , in year was the population 160?
1650
1700
1750
1800
None of these
ANSWER : 3
Descrption
<pre>যেহেতু population 50% increase করে প্রতি 50 বছর, 1950 এর population 150% ছিল অথবা <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>3</mn><mn>2</mn></mfrac><mi>o</mi><mi>f</mi><mn>1900</mn></math> এর population অর্থাৎ 1900 এর population 1950 এর <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mn>3</mn></mfrac></math> গুণ, আমরা <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mn>3</mn></mfrac></math> দ্বারা গুণ করে যেতে থাকব যতক্ষণ পর্যন্ত 160 পাওয়া যায়। <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>1950</mn><mo>:</mo><mn>810</mn><mo>×</mo><mfrac><mn>2</mn><mn>3</mn></mfrac><mo> = </mo><mn>540</mn><mo> </mo><mi>i</mi><mi>n</mi><mo> </mo><mn>1900</mn><mo>;</mo><mo> </mo><mn>540</mn><mo>×</mo><mfrac><mn>2</mn><mn>3</mn></mfrac><mo> = </mo><mn>360</mn><mo> </mo><mi>i</mi><mi>n</mi><mo> </mo><mn>1850</mn><mo>;</mo><mo> </mo><mo> </mo><mn>360</mn><mo>×</mo><mfrac><mn>2</mn><mn>3</mn></mfrac><mo> = </mo><mn>240</mn><mo> </mo><mi>i</mi><mi>n</mi><mo> </mo><mn>1800</mn><mo>;</mo><mo> </mo><mn>240</mn><mo>×</mo><mfrac><mn>2</mn><mn>3</mn></mfrac><mo> = </mo><mn>160</mn><mo> </mo><mi>i</mi><mi>n</mi><mo> </mo><mn>1750</mn></math> </pre>
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