Eighteen identical machines working independently finish one order in 5 hours. How many machines are needed to finish that same order in 3 hours? Enter the number of machines.
Richtige Antwort
30
Erklärung
The order needs 18 times 5, or 90 machine-hours, so completing it in 3 hours requires 90 divided by 3, which is 30 machines. Reducing the machine count in line with the shorter time would apply direct proportion and could not finish the same work sooner.