Question
Download Solution PDFA man drives his car for 24 km at a speed of 48 km/h, and for the next 1.5 hours he drives at a speed of 80 km/h. Find his average speed (in km/h) for the entire journey.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven :
A man drives his car for 24 km at a speed of 48 km/h.
Next 1.5 hours he drives at a speed of 80 km/h.
Formula Used :
Average Speed = Total distance travelled/Total time taken
Calculation :
Time taken for 24 km = 24/48 = 0.5 hours
Distance covered in 1.5 hours = 80 × 1.5 = 120 km
Average Speed = 120 + 24/(1.5 + 0.5)
⇒ 144/2 = 72 km/hr
∴ The correct answer is 72 km/hr.
Last updated on Jul 12, 2025
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