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[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
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
15 Aug 2019, 19:01
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Answer : B
distance covered by A and B in 30 minutes is = 2 Km. ( Circumference of the lake)
combined speed= 4 km/hr
Answer B
Posted from my mobile device
distance covered by A and B in 30 minutes is = 2 Km. ( Circumference of the lake)
combined speed= 4 km/hr
Answer B
Posted from my mobile device
15 Aug 2019, 22:00
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MathRevolution
[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
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
Given: 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.
Asked: What is the sum of the speeds of A and B?
Total distance = 2 km
Total time = 30 min = .5 hour
Sum of speeds of A & B = 2 /. 5 = 4 km/hr
IMO B
