Question
A car travels from A to B at the rate of 40 km/h and returns from B to A at the rate of 60 km/ h. Its average speed during the whole journey is
Answer: Option C
Answer: (c)Here, distance is same.Average speed = ${2xy}/{x + y}$= $({2 × 40 × 60}/{40 + 60})$ kmph.= $({2 × 40 × 60}/100)$ kmph.= 48 kmph.
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Answer: (c)Here, distance is same.Average speed = ${2xy}/{x + y}$= $({2 × 40 × 60}/{40 + 60})$ kmph.= $({2 × 40 × 60}/100)$ kmph.= 48 kmph.
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