Tom and Jerry have to stuff and seal 84 envelopes for a new marketing campaign Jerry can envelopes in 2 minutes. Tom can do 3 envelopes per minute How long would take them the work together
Is Jerry's rate 2 envelopes per minute???
i'll assume jerry can stuff 2 envelopes / min
84 env / ( 2 env/min + 3 env/min) = 84/5 = 16.8 mins