A can do a piece of work in 15 days and B can do it in 10 days. Working together how long will they take to finish the work?

dsuc.created: 7 years ago | dsuc.updated: 1 week ago

dsuc.updated: 1 week ago

4 days

5 days

6 days

7 days

8 days

Social Islami Bank Ltd Social Islami Bank Ltd - Trainee Officer - 31.12.2010 গণিত

dsuc.explanation

477

common.best_ans:

In 15 days A can do 1 portion

in 1 days A can do 1/15 portion

In 10 days B can do 1 portion

In 1 days B can do 1/10 portion

In 1 day A & B can do ( 1/15 + 1/10) or 2 + 3/30

or 5/30 or 1/6 portion

A & B can finish 1/6 portion in 1 day

A & B can finish 1 portion in 1/6 day

= 6 days

7 years ago

0 0

Md Azizur Rahman

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গণিত

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