Question

a alone cam do work in 12 days and b alone can do work in 15 days .if both of them work together how long will they take to complete the work​

Answer 1

Answer:

Step-by-step explanation:

a's 1 day work=1/12

b's 1 daay work=1/15

total time if they work together=1/12+1/15

                                                       =lcm=60

                                                       =5+4/60

                                                       =9/60

total time=60/9

                =6 integer6/9

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