This question was previously asked in

MP Police Constable Previous Paper 21 (Held On: 31 Aug 2017 Shift 1)

- 25 kmph
- 30 kmph
- 32 kmph
- 40 kmph

Option 3 : 32 kmph

**Given:**

The speed of the person to cover 30 km = 60 km/h

The speed of the person to cover 50 km = 25 km/h

**Formula used:**

Time = Distance/Speed

Average speed = Total distance/Total time taken

**Calculation:**

The time taken to cover 30 km = 30/60 h

⇒ 1/2 h

The time taken to cover 50 km = 50/25 h

⇒ 2 h

Average speed = (30 + 50)/(2 + 1/2)

⇒ 80/(5/2)

⇒ 80 × (2/5)

⇒ 16 × 2

⇒ 32 km/h

**∴ The average speed is 32 km/h.**

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