Subject

    Bank Exam

    Topic

    Rajshahi Krishi Unnayan Bank - 2015 (SO)

    Mr. Rafim can complete a job in 15 days, while Mr. Shafin takes twice as long to do the same. If the work together how many days will they require to complete the job?

    ক)
    10
    খ)
    12
    গ)
    14
    ঘ)
    11

    Explanation

    Mr. Rafim can do 1 days=1/15 parts and Mr. Shafin can do 1 days=1/30 parts (Mr. Rafim+ Mr. Shafin) can do 1 days=(1/15 +1/30) parts “         “                   “                   “              = 1/10 parts (Mr. Rafim+ Mr. Shafin), 1/10 parts can do = 1 day So,  1  part   “      “  = 10 days

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