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Problem Solving (PS) | Re: A lake has a circumference of two kilometers. A and B both departed fr

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MathRevolution wrote:

[GMAT math practice question]

A lake has a circumference of two kilometers. A and B both departed from the same point on the circumference at the same time and walked in opposite directions. They met 30 minutes after their departure. What is the sum of the speeds of A and B?

A. 3 km/hr
B. 4 km/hr
C. 5 km/hr
D. 6 km/hr
E. 7 km/hr


Total Speed =\(\frac{Total Distance}{Total Time Taken}\) --- (1)

Let distance covered by A be = x km

So, distance covered by B will be = (2 - x) km

Hence total distance covered
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