rama can do a piece of work in 10 days and shyam in 13 days. if both of them work together, how long will they take to finish the work ?
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Number of days taken by Rama = 10
Work some by Rama in a day = 1/10
Number of days taken by Shyam = 13
Work done by Shyam in a day = 1/13
Work done by both of them
Work done by both of them together in a day = 1/10 + 1/13
Work done by both of them together in a day = 1/10 + 1/1310+13/130------------>23/130
Number of days taken by both = 130/23
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