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A man goes with the average speed of 18 km/hr from Indore to Bhopal and return back to Indore with the speed of 22 km/hr. Find the average speed of man?1. 19.8 km/hr2. 18.2 km/hr3. 20.5 km/hr4. 21.9 km/hr |
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Answer» Correct Answer - Option 1 : 19.8 km/hr According to the given question Given: Average speed of man when he goes from Indore to Bhopal is 18 km/hr And average speed of man when he goes from Bhopal to Indore is 22 km/hr Formula used/Concept Used: Here the distance is same ∴ Average speed = (2xy/x + y) Where x and y are the speeds Calculation: Average speed of man when he go from Indore to Bhopal is 18 km/hr and average speed of man when he go from Bhopal to Indore is 22 km/hr ∴ Average speed = (2 × 18 × 22/(40)) = 19.8 km/hr ∴ The average speed of man is 19.8 km/hr |
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