This question was previously asked in

UP TGT Mathematics 2021 Official Paper

- 40 kmphs
- 45 kmph
- 48 kmph
- 50 kmph

Option 3 : 48 kmph

Stay updated with the Quantitative Aptitude questions & answers with Testbook. Know more about Speed Time and Distance and ace the concept of Average Speed.

**Given:**

Speed of person from A to B at a speed of 40 km/hr

**Formula used:**

Average speed = Total distance/Total time

Average speed when distance is same,

Average speed = (2 S_{1}S_{2})/(S_{1} + S_{2})

**Calculation:**

Speed of person from B to A = 40 + 50% of 40 = 60 km/hr

Average speed = (2 × 40 × 60)/(40 + 60)

⇒ 4800/100

⇒ 48 km/hr

**∴ The average speed for both the trips is 48 km/hr**

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