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Two cars A and B travel from one city to another, at speeds of 72 km/h and 90 km/h respectively. If car B takes 2 hours lesser than car A for the journey, then what is the distance (in km) between the two cities?1. 600 km2. 540 km3. 520 km4. 720 km |
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Answer» Correct Answer - Option 4 : 720 km Given: Speed of car A = 72 km/h Speed of car B = 90 km/h If car B takes 2 hours lesser than car A for the journey, Formula used: Time =Distance/Speed Calculations: Let the distance between the two cities be x km. According to the question, (x/72) – (x/90) = 2 ⇒ (5x – 4x)/360 = 2 ⇒ x = 720 km ∴ The total distance between both the cities is 720 km |
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