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29 Sep 2019, 08:16
Kudos
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
13% (01:17) correct
88%
(01:36)
wrong
based on 8
sessions
History
Date
Time
Result
Not Attempted Yet
It takes the pendulum of a clock 7 seconds to strike 4 o’clock. How much time will it take to strike
11 o’clock?
(a) 18 seconds
(b) 20 seconds
(c) 19.25 seconds
(d) 23.33 seconds
11 o’clock?
(a) 18 seconds
(b) 20 seconds
(c) 19.25 seconds
(d) 23.33 seconds
06 Feb 2022, 21:48
Kudos
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Can someone please explain how the OA is D and not C? I assumed the pendulum times will be proportional.
Posted from my mobile device
Posted from my mobile device
20 Feb 2022, 02:02
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gmatbalar
Can someone please explain how the OA is D and not C? I assumed the pendulum times will be proportional.
Posted from my mobile device
Posted from my mobile device
It takes 7 seconds for a clock for 3 interval movement ('n' hours, 'n-1' intervals)
For 10 interval movements, it takes (7/3)*10 = 21 (1/3) seconds. D is the answer.
