1.

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

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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