Fleming can finish a work in 18 days and Robert can do the same in half the time taken by Fleming. Then, working together , what part of the same work they can finish in a day ?
Fleming's 1 day's work = 1/18
and Robert's 1 day's work = 1/9
(Fleming+Robert)'s 1 day's work = (1/18+1/9)
please help me for this operation (1/18 + 1/9 ) how to get = 1/6 ?
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