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A and B start from the same point and travel in the same direction around a circular track 3 km in circumference. If their speed are 2 meter/sec and 1.5 meter/sec, when will they meet first together again at the starting point?1. 60 min2. 80 min3. 100 min4. 120 min |
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Answer» Correct Answer - Option 3 : 100 min GIVEN: A and B start from the same point and travel in the same direction around a circular track 3 km in circumference. Their speeds are 2 meter / sec and 1.5 meter / sec. CALCULATION: Time taken by A for 1 round = 3000/2 = 1500 sec And Time taken by B for 1 round = 3000/1.5 = 2000 sec Now, LCM of 1500 and 2000 sec = 6000 sec = 100 min Hence, They will meet after 100 min first together again at the starting point. |
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