GMAT Question of the Day (December 9)

Math

A contractor estimated that his 10-man crew could complete the construction in 110 days if there was no rain. (Assume the crew does not work on any rainy day and rain is the only factor that can deter the crew from working). However, on the 61-st day, after 5 days of rain, he hired 6 more people and finished the project early. If the job was done in 100 days, how many days after day 60 had rain?

A. 4
B. 5
C. 6
D. 7
E. 8

Verbal

Cherapunji receives more rainfalls than any other site of the world, yet the agriculture so fertile and the water reservoirs are efficient, so that the water does not overflow the land; otherwise, the level of surface water would rise unexpectedly and flood most of the state’s renowned towns.

(A)
are efficient, so that the water does not overflow on the land; otherwise,
(B)
are efficient so that the water does not overflow the land; were it to do so,
(C)
so efficient that the water does not overflow on the land, or else
(D)
efficient, so that the water does not overflow on the land, or
(E)
efficient so that the water does not only overflow the land; if it did

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