Question

A farmer can reap a field in 15 days while his son can reap in 10 days. If they work together, in how much time can they reap the field?​

Answer 1

Answer:

Given,

In 10 days, farmer can reap a complete field.

So, In 1 day farmer can reap field =

10

1

portion

In 8 days farmer's wife can reap a complete field.

So, In 1 day farmer’s wife can reap field =

8

1

portion

Both farmer and his wife can reap field in 1 day =

10

1

+

8

1

portion

=

40

4+5

=

40

9

Now,

40

9

part of field is reap in 1day

∴ complete field is reap in

9

40

days i.e. 4. 4/9

days.