It takes a night security officer 40 minutes to check each o

It takes a night security officer 40 minutes to check each of the doors in an office building to make sure they are locked. What is the officer\'s rate of work? _____ of the job per minute

It takes a high school math teacher 2 hours to make out the semester report cards. what part of the job does she complete in x hour?

Solution

it takes 4o mintues to check weather a door is locked or not

so officer\'s rate of work is depends on the number of doors

40 minutes he is completing 100% of his job

per minute how much job he has to do

rate of work = 40/100 = 0.4 of the job per minute

2hours to make out 100% report cards

x hours she can complete 50x report cards