Question

After Corona epidemic, schools reopen and classes start, Sid went to school. In his Maths period, he faced a problem while solving one question. Help him to find the solution of question. “6years ago, Zubair got engaged. His present age is 4/3 times his age at time of engagement. Zubair’s sister Zainab was 4 years younger to him at the time of his engagement. What is the present age of Zainab?”
1. 20 years
2. 18 years
3. 19 years
4. None of these

Answer 1

Correct Answer - Option 1 : 20 years

Given∶

6 years ago Zubair got engaged. His present age is 4/3 times his age at time of engagement.

Zubair’s sister Zainab was 4 years younger to him at the time of his engagement.

Formula Used∶

Concept of Linear Equations and Simplification.

Calculation∶

Let the present age of Zubair be ‘x’ years, then 6 years ago, Zubair age = (x – 6) years

According to question,

His present age is 4/3 times his age at the time of engagement.

x = 4/3 × (x – 6)

⇒ 3x = 4x – 24

⇒ x = 24

Age of Zubair at the time of engagement = x – 6 = 24 – 6 = 18 years

According to question,

Zainab’s age at time of engagement = x – 4 = 18 - 4 = 14 years

Her present age = 14 + 6 = 20 years

∴ the present age of Zainab is 20 years