Problema Solution
it takes 3 hours for 2 concrete mixers to mix a fixed amount of concrete. the number of hours varies inversely as the number of concrete mixers are used. how long would it take 5 concrete mixers to do the same job?
Answer provided by our tutors
y = k/x
3 = k/2
6 = k
y = 6/x
y = 6/5
6/5 hours or 1.2 hours or 1 hour and 12 minutes