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SSC Selection Post 2019 PYQ — Question 68

SSC Selection Post - Matriculation Level 2019 - 14 Oct 2019 - Shift 1 • Quantitative Aptitude • Q68

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A student covers a distance by cycle at 6 km/h. He returns to the starting point in a bus at a speed of 42 km/h. The average speed (in km/h) for the entire journey is: 

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Correct answer: D

Explanation

The correct answer is Option 4 i.e. 10.5

Speed while going (cycle) = 6 km/h

Speed while returning (bus) = 42 km/h

Average speed = 2×6×426+42\frac{2 \times 6 \times 42}{6 + 42} = 50448\frac{504}{48} = 10.5 km/h