If a job takes 12 workers to complete in 4 hours, how long should it take 15 workers to complete the job? 

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OSSC Junior Stenographer, Junior Typist (Prelims) Official Paper (Held On: 09 Feb, 2025)
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  1. 3 hr 12 min 
  2. 3 hr 24 min
  3. 3 hr 30 min
  4. None of the above

Answer (Detailed Solution Below)

Option 1 : 3 hr 12 min 
Free
OSSC CRE (Junior Steno, JG Typist and Typist-cum-Scribe) - Mini Full Test
30 Qs. 30 Marks 25 Mins

Detailed Solution

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Given:

Men₁ = 12, Time₁ = 4 hours

Men₂ = 15, Time₂ = ?

Formula used:

Men₁ × Time₁ = Men₂ × Time₂

Calculation:

12 × 4 = 15 × Time₂

⇒ 48 = 15 × Time₂

⇒ Time₂ = 48 ÷ 15 = 3.2 hours

⇒ 0.2 hour = 0.2 × 60 = 12 minutes

Time = 3 hours 12 minutes

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