Find your Math Personality!
Find your Math Personality!
Sindhu is 40 years old and Smita is 20 years old. How many years ago was Sindhu three times as old as Smita?
Equation helps us to model a real life situation using algebraic expressions
Answer: If Sindhu is 40 years old and Smita is 20 years old now, 10 years ago Sindhu was three times as old as Smita
Let 'z' years ago, Sindhu's age be 3 times as old as Smita's age
We will be solving the value of z
Explanation:
Given: Sindhu's present age = 40 years
Smita's present age = 20 years
'z' years ago,
Sindhu's age = 40 - z
Smita's age = 20 - z
According to the question, 'z' years ago
Sindhu's age = 3 times of Smita's age
=> 40 - z = 3 × (20 - z)
=> 40 - z = 60 - 3z
=> 2z = 60 - 40
=> 2z = 20
=> z = 10
Therefore, if Sindhu is 40 years old and Smita is 20 years old now, 10 years ago Sindhu was three times as old as Smita
Math worksheets and
visual curriculum
visual curriculum