A girl goes from M to N at a speed of 25 km h and remrns to M at a speed of 37 5 km h via the same r...........

Quantitative Aptitude (MTS) Time & distance

A girl goes from M to N at a speed of 25 km/h and remrns to M at a speed of 37.5 km/h, via the same route. What is the girl's

average speed (in km/h)?

This questions was previously asked in

SSC MTS 26th July 2022 Shift-3

31.25

27.5

- The girl's journey includes two parts: from M to N and back from N to M.

- The speed from M to N is 25 km/h, and the speed back from N to M is 37.5 km/h.

- The average speed for round trips is calculated using the formula:

Average Speed = (2 × Speed1 × Speed2) / (Speed1 + Speed2).

- Plug in the values:

Average Speed = (2 × 25 × 37.5) / (25 + 37.5).

- This simplifies to:

Average Speed = (2 × 25 × 37.5) / 62.5 = 30 km/h.

- Option 2, 30 km/h is correct.

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