The ratio of 250 m and 0.75 cm is:

A man borrowed a sum of money at $15\%$ simple interest. He paid $Rs. 2250$ as interest after $5$ years. The sum borrowed by him is:

If the compound interest on a sum for $2$ years at $12.5\%$ is $Rs 3400$, the simple interest will be _____.

A publisher allows $25\%$ trade discount and $2\%$ cash discount to the bookseller. If he gets an order of $Rs. 5000$, then the net price to be paid by the book-seller will be:

The average of four consecutive number $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ respectively is $49.5$. What is the product $\mathrm{B}$ and $\mathrm{D}$ ?

Mishra, Sharma and Shukla started a business with $Rs. 47000$. Mishra invested $Rs. 5000$ more than Sharma and Sharma invested $Rs. 3000$ more than Shukla. The share of Mishra out of the profit of $Rs.14100$ will be:

15 years hence, Karim will be just four time as old as he was 15 years ago. His present age is:

When $30\%$ of one number is subtract from another number, the second number reduces to its four-fifth. What is the ratio between the first and the second number respectively?