Part C - Elementary Mathematics
A is four times as good a workman as B and together they finish a piece of work in \( \frac{84}{15} \) days. In how many days can A alone finish the work?
The profit earned on selling an article for Rs. 4,550 is 5 times of the loss incurred on selling the same article for Rs. 3,290. What will be the selling price of the article to earn a profit of 20 percent?
If 25 workers can build a wall in 10 days, how many days will it take for 20 workers to build a similar wall?
\( \frac{25}{4} \) days
\( \frac{23}{3} \) days
\( \frac{21}{2} \) days
\( \frac{25}{2} \) days