Mr. Shamin's salary increases every year by 10% in June. If there is no other increase or reduction in the salary and his salary in June 2024 was Rs. 22,385/-, what was his salary in June 2022

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CSIR-CLRI JSA 2024 Official Paper-I (Held On: 16 Feb, 2025)
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  1. Rs. 18,650/-
  2. Rs. 18,000/-
  3. Rs. 19,250/-
  4. Rs. 18,500/-

Answer (Detailed Solution Below)

Option 4 : Rs. 18,500/-
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Detailed Solution

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Given:

Salary in June 2024 = ₹22,385

Annual increase rate = 10%

Time (t) = 2 years

Formula used:

A = P(1 + r/100)t

Where,

A = Amount (Salary in June 2024)

P = Principal (Salary in June 2022)

r = Rate (10%)

t = Time (2 years)

Calculation:

22,385 = P(1 + 10/100)2

⇒ 22,385 = P(1 + 0.1)2

⇒ 22,385 = P(1.1)2

⇒ 22,385 = P(1.21)

⇒ P = 22,385 / 1.21

⇒ P = 18,500

∴ The correct answer is option (4).

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