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SSC Selection Post 2024 PYQ — Question 71

SSC Selection Post - Matriculation Level - 20 June 2024 - Shift 1 • Quantitative Aptitude • Q71

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A car covers the distance from Delhi to Gurugram at 60 km/h and returns at a uniform speed of 40 km/h. The average speed of the car during the whole journey is:

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Correct answer: D

Explanation

The correct answer is Option 4 i.e. 48 km/h.

Average speed = 2xyx+y2xy \over {x+y}

⇒ 2×60×4060+402\times60\times40 \over{60+40}

⇒ 2×60×401002\times60\times40 \over{100} = 2 × 6 × 4 = 48 km/hr