GMAT数学题,
Acertainclockmarkseveryhourby
strikinganumberoftimesequaltothe
hourandthetimerequiredforastroke
isexactlyequaltothetimeinterval
betweenstrokes.At6:00thetime
lapsebetweenthebeginningofthe
firststrokeandtheendofthelast
strokeis22seconds.At12:00,how
manysecondselapsebetweenthe
beginningofthefirststrokeandthe
endofthelaststroke?
(A)72
(B)50
(C)48
(D)46
(E)44