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A car travels between two stations with an average speed of 60 km/hr and comes back with average speed of 90 km/hr. What is the average speed of the car in the whole journey?

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Uttarakhand Police Constable Official Paper (Held On: 18 Dec 2022)
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  1. 85 km/hr
  2. 80 km/hr
  3. 72 km/hr 
  4. 75 km/hr

Answer (Detailed Solution Below)

Option 3 : 72 km/hr 
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Detailed Solution

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Has been given:

Speed ​​from A to B = 60 km/hr

Speed ​​from B to A = 90 km/hr

Formulas used:

Average speed of the whole journey =  (when same distance is covered)

Calculation:

⇒ Average speed = 

⇒ Average speed = 72 km/hr

∴ The average speed of the car for the whole journey is 72 km/hr.

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Last updated on Feb 21, 2025

-> The Hall Ticket for Physical Efficiency Test of Uttarakhand Police Constable has been released. 

-> Uttarakhand Police Constable Notification 2024 was released for 2000 Vacancies of Constable District Police (Male) and Constable PAC/IRB (Male) under the Uttarakhand Police Department.

-> The Written test is tentatively scheduled for 15th June 2025. 

-> The selected candidates under the recruitment process will get Uttarakhand Police Constable Salary range between Rs. 21,700 to Rs. 69,100.

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