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SSC Selection Post 2022 PYQ — Question 74

SSC Selection Post - Matriculation Level - 05 Aug 2022 - Shift 3 • Quantitative Aptitude • Q74

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A person covers a distance of 24 km at 8 km/h, a distance of 18 km at 9 km/h and a distance of 12 km at 3 km/h. What is the average speed?

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Correct answer: D

Explanation

The correct answer is option 4 i.e. 6 km/h.

Time = 248+189+123=3+2+4=9\frac{24}{8}+\frac{18}{9}+\frac{12}{3}=3+2+4=9 hr

Total distance = 24 + 18 + 12 = 54 km

Average speed = 549=6\frac{54}{9}=6 km/hr