Question
Download Solution PDFA car covers 3 successive 2 km stretches at speed of 20 km/hr, 40 km/hr and 60 km/hr respectively. Its average speed is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
A car covers 3 successive 2 km stretches at speed of 20 km/hr, 40 km/hr and 60 km/hr respectively.
Concept used:
Its average speed = Total distance / total time
Calculation:
Total distance travelled 2 ×3 = 6km
Total time taken,
((2 /20) + (2 /40) + (2/60)} × 60 minutes
⇒ 11 minutes
Its average speed is 6 × 60/11 = 32.72 km/hr
∴ The correct option is 4
Last updated on May 28, 2025
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