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A person walks a distance from point A to B at 15 km/h, and from point B to A at 30 km/h. If he takes 3 hours to complete the journey, then what is the distance from point A to B?1. 30 km2. 25 km3. 10 km4. 15 km |
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Answer» Correct Answer - Option 1 : 30 km Given: A person walks a distance from point A to B at 15 km/h, and from point B to A at 30 km/h. He takes 3 hours to complete the journey, Concept used: Distance = velocity × time Velocity = distance/time Time = distance/velocity Calculation: Let the distance between A to B be x km According to the question, x/15 + x/30 = 3 ⇒ 3x/30 = 3 ⇒ x = 30 km ∴ The distance between A to B is 30 km. |
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