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SSC MTS 2022 PYQ — Question 53

SSC MTS - 26 July 2022 - Shift 3 • Quantitative Aptitude • Q53

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A girl goes from M to N at a speed of 25 km/h and returns to M at a speed of 37.5 km/h, via the same route. What is the girl's average speed (in km/h)?

Show answer & explanation

Correct answer: B

Explanation

The correct answer is option 2 i.e. 30

Average speed of the girl = 2×25×37.525+37.5\frac{{2\times25\times 37.5}}{25+37.5}

Average speed of the girl = 187562.5\frac{{1875}}{62.5}

Average speed of the girl = 30 km/h