Earl can stuff advertising circulars into envelopes at the rate of 36 envelopes per minutes and Ellen requires a minutes and half to stuff the same number of envelops.Working together,how long will it take Earl and Ellen to stuff 300 envelopes	Options:
A) 6 minutes  B) 5 minutes  C) 7 minutes  D) 3 minutes  E) 4 minutes
earl takes 1 min. for 36 envelopes.   ellen takes 3/2 mins for the same. so ellen can stuff ((36)/(3/2)) in 1 min. i.e., 24 envlpes a min.   so both of them when work together can stuff 36+24= 
<gadget id="calculator">36+24</gadget>
<output>60</output>
60 envelopes in 1 min.   for 300 envelopes they will take 300/60 mins. i.e., 5 mins.   ANSWER:5 minutes
<result>B</result>
Earl can stuff advertising circulars into envelopes at the rate of 36 envelopes per minutes and Ellen requires a minutes and half to stuff the same number of envelops.Working together,how long will it take Earl and Ellen to stuff 300 envelopes