Question
Download Solution PDFA truck travels from city A to city B at an average speed of 60 km/hr. The journey takes 30 hours. He returns from city B to city A on the same road at an average speed of 40 km/hr. What was the average speed of the truck during the entire journey?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven
Speed = 60 km/hr
Time = 30 hours.
Formula used
Average speed = Total distance/Total speed
Calculation
Distance of journey = 60 × 30 = 1800
Time taken from B to A = 1800/40 = 45 hours.
⇒ 3600/(45 + 30)
⇒ 3600/75 = 48 km /hr
The answer is 48 km/hr.
Last updated on Jun 30, 2025
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