Question
Gautam goes to office at a speed of 12 kmph and returns home at 10 kmph. His average speed is :
Answer: Option A
Answer: (a)Here distances are same.∴ Average speed = $({2xy}/{x + y})$ kmph= $({2 × 12 × 10}/{12 + 10})$ kmph= $(240/22)$ kmph = 10.9 kmph
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Answer: (a)Here distances are same.∴ Average speed = $({2xy}/{x + y})$ kmph= $({2 × 12 × 10}/{12 + 10})$ kmph= $(240/22)$ kmph = 10.9 kmph
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