{"id":4956,"date":"2024-03-05T16:15:13","date_gmt":"2024-03-05T16:15:13","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=4956"},"modified":"2024-03-05T16:15:13","modified_gmt":"2024-03-05T16:15:13","slug":"a-person-goes-from-a-to-b-at-60-km-hr-and-returns-from-b-to-a-at-40-km-hr-what-is-his-average-speed-for-the-entire-journey","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/a-person-goes-from-a-to-b-at-60-km-hr-and-returns-from-b-to-a-at-40-km-hr-what-is-his-average-speed-for-the-entire-journey\/","title":{"rendered":"A person goes from A to B at 60 km\/hr and returns from B to A at 40 km\/hr. What is his average speed for the entire journey ?"},"content":{"rendered":"

[amp_mcq option1=”50km\/hr” option2=”45km\/hr” option3=”55 km\/hr” option4=”48 km\/hr ” correct=”option2″]<\/p>\n

The correct answer is (b) 45 km\/hr.<\/p>\n

The average speed is not just the average of 60 km\/hr and 40 km\/hr. This is because the person travels for different distances at different speeds. To calculate the average speed, we need to consider the total distance traveled and the total time taken.<\/p>\n

The total distance traveled is 2 * 60 = 120 km.<\/p>\n

The total time taken is 60 \/ 60 + 60 \/ 40 = 3 hours.<\/p>\n

Therefore, the average speed is 120 \/ 3 = 40 km\/hr.<\/p>\n

Option (a) is incorrect because it is the average of the two speeds, but it does not take into account the total distance traveled.<\/p>\n

Option (c) is incorrect because it is the average speed of the first leg of the journey, but it does not take into account the second leg of the journey.<\/p>\n

Option (d) is incorrect because it is the average speed of the second leg of the journey, but it does not take into account the first leg of the journey.<\/p>\n","protected":false},"excerpt":{"rendered":"

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