A certain ball was dropped from a window 8 meters above a sidewalk. On each bounce, it rose straight up exactly one-half the distance of the previous fall. After the third bounce, the ball was caught when it reached a height of exactly 1 meter above the sidewalk. How many meters did the ball travel in all?
A. 21
B. 19
C. 17
D. 15
E. 13
The OA is A
Source: GMAT Paper Tests
A certain ball was dropped from a window 8 meters above a
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Drop 8 metersswerve wrote:A certain ball was dropped from a window 8 meters above a sidewalk. On each bounce, it rose straight up exactly one-half the distance of the previous fall. After the third bounce, the ball was caught when it reached a height of exactly 1 meter above the sidewalk. How many meters did the ball travel in all?
A. 21
B. 19
C. 17
D. 15
E. 13
The OA is A
Source: GMAT Paper Tests
Rise 4 meters
Drop 4 meters
Rise 2 meters
Drop 2 meters
Rise 1 meters (DONE!)
8 + 4 + 4 + 2 + 2 + 1 = 21 meters
Answer: A
Cheers,
Brent