Question
Download Solution PDFA man covers a certain distance at a speed of 40 km/hr and returns to the starting point at a speed of 60 km/hr. Find his average speed for the entire journey.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Speed for the first part of the journey = 40 km/hr
Speed for the return journey = 60 km/hr
Formula used:
Average speed = (2 × Speed1 × Speed2) / (Speed1 + Speed2)
Calculation:
Average speed = (2 × 40 × 60) / (40 + 60)
⇒ Average speed = (2 × 2400) / 100
⇒ Average speed = 4800 / 100
⇒ Average speed = 48 km/hr
∴ The correct answer is option (2).
Last updated on Apr 24, 2025
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