2. The RHU vaccine team has 100 persons to be vaccinated. If nurse Pfizer takes 8 hours to vaccine all 100 persons and nurse
Moderna takes 12 hours, how long will take them to do the job together?
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Nurse Pfizer takes 1hour to vaccinate100/8 persons
Nurse Moderna takes 1 hours to vaccinate 100/12 person
they take 1 hours to vaccinate (100/8+100/12) persons
=500/24 persons
to vaccinate 500/24 persons they take 1 hour
to vaccinate 100 persons they take (25×100)/500 hours=24/5 hours=4 hours and 48 minutes
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