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SSC GD 2023 PYQ — Question 41

SSC GD Constable (English) - 6 Feb 2023 - Shift 3 • Quantitative Aptitude • Q41

Back to paper

A bike rider covers a fixed distance at a speed of 60 km/h and returns back at a speed of 80 km/h. What is his average speed?

Show answer & explanation

Correct answer: B

Explanation

The correct answer is option 2 i.e.  684768{{} 4\over 7} km/hr

Given that

A bike rider travels a distance at a speed of (x = 60 km/h)

The bike return this distance at a speed of (y = 80 km/h)

Formula used

The average speed = 2xy/(x + y)

Calculation

⇒ 2 × 60 × 80/(60 + 80)

⇒ 9600/140

⇒ 684768{{} 4\over 7} 

Hence, the average speed is 684768{{} 4\over 7} km/hr