Question

a can do a job in 15 days, and B in 10 days.how many days will they take to finish the job if they work together?
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Answer 1

Answer:

I think 5days.

it is not correct answer.it is a guess.so please check and write the answer

Answer 2

• A takes 1 day to complete 1/15th work
• B takes 1 day to complete 1/10 work
• working toghter in one day
• 1/15+1/10 work is done
• 6/60 work is done In a day
• therefore 60/6 days are needed to comple the work
• answer 6 days