A policeman chases a thief. The speed of the policeman and thief are 18 km/h and 6 km/h, respectively. If the policeman started 10 minutes late, at what distance will he catch the thief? 

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SSC Selection Post 2024 (Matriculation Level) Official Paper (Held On: 24 Jun, 2024 Shift 4)
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  1. 1.0 km
  2. 1.5 km
  3. 2.0 km
  4. 2.5 km

Answer (Detailed Solution Below)

Option 2 : 1.5 km
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Detailed Solution

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Given:

Speed of Policeman = 18 km/h

Speed of Thief = 6 km/h

Time delay for Policeman = 10 minutes = 10/60 hours = 1/6 hours

Formula used:

Distance = Speed × Time

Calculations:

Distance covered by Thief in 1/6 hours = 6 km/h × 1/6 hours

⇒ Distance = 1 km

Relative speed of Policeman with respect to Thief = 18 km/h - 6 km/h

⇒ Relative speed = 12 km/h

Time taken to catch the Thief = Distance / Relative speed

⇒ Time = 1 km / 12 km/h

⇒ Time = 1/12 hours

Distance covered by Policeman in this time = 18 km/h × 1/12 hours

⇒ Distance = 1.5 km

∴ The correct answer is option (2).

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