Step-by-step explanation:
Hey there!
According to the question;
Aakash can complete a work in 10 days.
That means;
In 10 days Aakash can complete 1 work.
In 1 day Aakash can complete (1/10) work.
In 4 days Aakash can complete (1/10)*4 part of work.
Therefore, in 4 days he can complete 2/5 part of work.
After 4 days Safal had to work.
So, work left was 1 - (2/5) {work left = whole work - done work}.
[tex]1 - \frac{2}{5} [/tex]
[tex] = \frac{3}{5} [/tex]
Therefore, the work Safal had to do was 3/5 part of work.
Hope it helps....
