If eight machines working at the same rate can do 3/4 of a job in 30 minutes, how many minutes would it take two machines working at the same rate to do 3/5 of the job? Choose the most appropriate option.
A) 45  B) 60  C) 75  D) 96  E) 100
using the std formula   m1d1h1/w1=m2d2h2/w2   substituting the values we have   8*1/2*4/3=2*5/3*x (converted 30 min into hours =1/2)   16/3=10/3*x   x=8/5 hour   so 96 minutes   ANSWER:96
<result>D</result>
If eight machines working at the same rate can do 3/4 of a job in 30 minutes, how many minutes would it take two machines working at the same rate to do 3/5 of the job?