Question

2. A can do a job i 15 days and B 10 days. How many days will they take to finish the job
of the work together?​

Answer 1

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2. A can do a job i 15 days and B 10 days. How many days will they take to finish the job

of the work together?

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$\large\bf{{\underline{To~solve}}:}$

(A+B)'s 1 day's work =(

15

1

+

10

1

)=

6

Work done by A and B in 2 days =(

6

1

×2)=

3

1

Remaining work =(1−

3

1

)=

3

2

Now ,

15

1

work is done byA in 1 day,

∴

3

2

work done by A in (15×

3

2

)=10 days