Each test is graded in
R=(3 teachers * 3 hours)/ 40 tesets
=9/40 teacher-hour/test
480 tests will require
Time=480 tests *R
=480* (9/40) tests*teacher-hours/test
=108 teacher-hours.
12 teachers will take
Time = 108 teacher-hours / 12 teachers
=108/12 hours
=9 hours.
If three teachers can grade 40 tests in 3 hours, how many hours will it take 12 teachers to grade 480 tests?
1 answer