A machine labels 150 bottles in 20 minutes. At this rate, how many minutes does it take to label 60 bottles?
A. 2
B. 4
C. 6
D. 8
E. 10
This is a simple case of solving proportions through cross-multiplication. If x is the number of minutes it takes to label 60 bottles, then
20/150 = x/60.
Cross-multiplying this gives us
150x = 1200,
x = 8.
The answer is (D).
source: kaptest.com
