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29 Nov 2017, 23:05
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Difficulty:
15%
(low)
Question Stats:
80% (00:43) correct
20%
(00:53)
wrong
based on 49
sessions
History
Date
Time
Result
Not Attempted Yet
Six balls, each of radius 5 centimeters, are placed side by side in a straight row with adjacent balls touching. What is the distance, in centimeters, between the center of the first ball and the center of the last ball?
(A) 40
(B) 45
(C) 50
(D) 55
(E) 60
(A) 40
(B) 45
(C) 50
(D) 55
(E) 60
29 Nov 2017, 23:26
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C.
The distance is r+2r+2r+2r+2r+r. Here r=5
Solving we get 50
Sent from my iPhone using GMAT Club Forum
The distance is r+2r+2r+2r+2r+r. Here r=5
Solving we get 50
Sent from my iPhone using GMAT Club Forum
29 Nov 2017, 23:37
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Bunuel
The distance = 4*10 + 2*5 = 50
C
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