time = ?
rate = t/m books/minutes
rate = 60t/m books/hr
time * rate * no. of machines = work
time * 60t/m * n = 10000
time = 10000m/60tn
Thus, D.
OA?
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ARCO question
Source: Beat The GMAT — Problem Solving |
i have followed this
let n=1 , produces 10 books = t in 1 min(m)
So, 10 books =1 min
10,000 books = 1000mins ~ 16.6 hrs
putting n=1,m=1,t=10 in D and you will get 16.6hrs
10,000m/60tn
10,000*1 / 60*10 ~ 16.6hrs.
So, D
OA Pls
let n=1 , produces 10 books = t in 1 min(m)
So, 10 books =1 min
10,000 books = 1000mins ~ 16.6 hrs
putting n=1,m=1,t=10 in D and you will get 16.6hrs
10,000m/60tn
10,000*1 / 60*10 ~ 16.6hrs.
So, D
OA Pls
Another approach:
1machine
t books in m/60 hours
n machines
nt books m/60 hours
10000 books ????
m/60 / nt *10000
=10000m/60nt
1machine
t books in m/60 hours
n machines
nt books m/60 hours
10000 books ????
m/60 / nt *10000
=10000m/60nt
















