Subject
Bank Exam
Topic
NCC Bank Ltd. 2011 (MTO)
Rashed can stuff advertising circulars into envelopes at the rate of 45 envelopers per minute and Reena requires a minute and a half to stuff the same number of envelopes. Working together, how long will it take Rashed and Reena to stuff 300 envelopes?
Rashed can stuff advertising circulars into envelopes at the rate of 45 envelopers per minute and Reena requires a minute and a half to stuff the same number of envelopes. Working together, how long will it take Rashed and Reena to stuff 300 envelopes?
ক)
15 minutesখ)
4 minutesগ)
3 minutes 30 secondsঘ)
3 minutes 20 secondsExplanation
in 60 seconds Rashed can stuff 45 envelope in 1 seconds Rashed can stuff 45/60=3/4 envelope again, in 90 seconds Reena can stuff 45 envelope in 1 seconds Reena can stuff 45/90=1/2 envelope Together in one second they can stuff=(3/4+1/2)=5/4 envelope they can stuff 5/4 envelope in 1 second they can stuff 1 envelope in 1X4/5 second they can stuff 300 envelope in 1X4X300/5 second=240 second=4 minutesRelated questions
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