Question
Download Solution PDFWhat is the average speed of a car which covers half the distance with a speed of 28 km/h and the other half with a speed of 84 km/h?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Speed for half the distance (S1) = 28 km/h
Speed for the other half (S2) = 84 km/h
Formula used:
Average Speed = 2 × S1 × S2 / (S1 + S2)
Calculations:
Average Speed = 2 × 28 × 84 / (28 + 84)
⇒ Average Speed = 2 × 28 × 84 / 112
⇒ Average Speed = 2 × 21
⇒ Average Speed = 42 km/h
∴ The correct answer is option (4).
Last updated on Jul 16, 2025
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