Edit Description

Fill up the form and submit

Question

A person's present age is two - fifth of the age of his mother. After 8 years. he will be one half of the age of his mother . What is the present age of the mother?

ANSWER : 3

Descrption

Suppose, mother's age is x, hence person's age is&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>2</mn><mi>x</mi></mrow><mn>5</mn></mfrac></math>After 8&nbsp;years, mother's age will be x + 8 and person's age will be&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>2</mn><mi>x</mi></mrow><mn>5</mn></mfrac><mo>+</mo><mn>8</mn><mo>=</mo><mfrac><mrow><mn>2</mn><mi>x</mi><mo>+</mo><mn>40</mn></mrow><mn>5</mn></mfrac></math>According to question,<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>x</mi><mo>+</mo><mn>8</mn><mo>=</mo><mfrac><mrow><mn>2</mn><mi>x</mi><mo>+</mo><mn>40</mn></mrow><mn>5</mn></mfrac><mo>×</mo><mn>2</mn></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>⇒</mo><mi>x</mi><mo>+</mo><mn>8</mn><mo>=</mo><mfrac><mrow><mn>4</mn><mi>x</mi><mo>+</mo><mn>80</mn></mrow><mn>5</mn></mfrac></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>⇒</mo><mn>5</mn><mi>x</mi><mo>+</mo><mn>40</mn><mo>=</mo><mn>4</mn><mi>x</mi><mo>+</mo><mn>80</mn></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>⇒</mo><mn>5</mn><mi>x</mi><mo>-</mo><mn>4</mn><mi>x</mi><mo>=</mo><mn>80</mn><mo>-</mo><mn>40</mn></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>∴</mo><mi>x</mi><mo>=</mo><mn>40</mn></math>Hence, mother's present age is 40&nbsp;

Please, login first. click here to login

Cancel Login

Edit Description

Question

Download Our Mobile Apps

Satt policy

Main Features

Subscribe our newsletter