Question

right answer will be marked as brainliest

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

13 (1/3) (or) 14 days

Step-by-step explanation:

Given that Santosh can do (7/10) work in 15 days.

Work done by Santosh in 1-day = (7/150).

Remaining work:

1 - 7/10

= 3/10

Amount of work he do in 4 days:

= (7/150) * 4

= 28/150

= 14/75

Amount of work she do in 1-day:

4 days = (3/10) - (14/75)

           = 17/150.

1-day = 17/600.

Amount of work done by both in 1-day:

1-day = (7/150) + (17/600)

        = 3/40

Number of days they work together:

(3/40) of the work done in 1-day.

(1/40) of the work done in (1/3) day.

Total work = (1/3) * 40

                 = 40/3

                 = 13 (1/3) days.

                 = ~14 days

Hope it helps!