If machine X ran continuously at a uniform rate to fill a production order, at what time did the machine finish filling the order?
(1) Machine X had
filled 2/3 of the order by 10:00 a.m. and 5/6 of the order by 10:30 a.m.
(2) Machine X had
filed 1/6 of the order by 8:30 a.m. and 1/3 of the order by 9:00 a.m.
How come statement B is sufficient?
As far as statement 1 is concerned:
Machine completed (5/6 - 2/3 = 1/6) of the order in half an hour. As the question says that the rate is constant and since at 10:30 it has 1/6 of the order remaining to fill, it will take another half an hour and finish filling the order at 11:00. Therefore, this statement is sufficient.
How come B is sufficient?
MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610
GMAT ==> 730