If A can do a work in $10$ days, then A's one day work is _____.

If B can do three-fourth of a work in $3$ days, then the time taken to complete the whole work is _____.

If A can type $60$ letters in a minute and B can type $120$ letters in a minutes, then both can type _____ letters in a minute.

If X can do a piece of work in $n$ days, then X's  $p$ days' work is _____.

The cost of $30$ mangoes is $₹150$. What is the cost of $60$ mangoes (in $₹$)?