(A) 10 Days
(B) 12 Days
(C) 14 Days
(D) 16 Days
Correct Option is: B
(90 * 32) persons can complete the work in 1 day.
1 person 1 day’s work = 1/(90 *32)
i.e., 1/2880
90 person’s 12 day’s work = 1/32 * 12 = 3/8
Remaining work =(1- 3/8) = 5/8
150 persons 1 day work = 150 / 2880
=5/96
Now 5/96 work is done by them in 1 day .
Therefore 5/8 work is done by them,
= (96/5*5/8)
=12 days.