Question : The distance between two places A and B is 60 km. Two cars start at the same time from A and B, travelling at speeds of 35 km/h and 25 km/h, respectively. If the cars run in the same direction, then they will meet after how many hours?
Option 1: 6.5
Option 2: 6.2
Option 3: 6
Option 4: 6.52
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Correct Answer: 6
Solution : The car runs in the same direction. So, the relative speed is (35 – 25) = 10 km/h. Use the formula, $\text{Time}=\frac{\text{Distance}}{\text{speed}}$ to find the required time that two cars take to meet. ${\text{Time}}=\frac{60}{10}=6$ hours Hence, the correct answer is 6 hours.
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