Question

Karim can finish a job alone in 7 upon one by two hours and munim can finish the same work alone in 5 hours if they work together in how much time can they finish the work?
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Answer 1

Answer:

Karan can finish a job in 7.5 hrs so 2/15

Munir can finish a job in 5 hrs so 1/5

now both are working together

so 2/15+1/5=(2+3)/15=5/15=1/3

so in 3 day both can complete the work together