A merchant buys an article for Rs. 27 and sells it at a profit of 10 % of the selling price. The selling price of the article is: 

A man bought an old typewriter for ₹1200 and spent ₹200 on its repair. He sold it for ₹1680. His profit percent is :

A man buys a cycle for ₹1400 and sells it at a loss of 15%. What is the selling price of the cycle?

On selling an article for ₹651, there is a loss of 7%. The cost price of that article is

A sum of money amounts to 5,200 in 5 years and to 5,680 in 7 years at simple interest. The rate of interest per annum is-

In how many years a sum of Rs. 3000 will yield an interest of Rs. 1080 at 12% per annum simple interest?

What annual instalment will discharge a debt of ₹ 6450 due in 4 years at 5% simple interest?

Alipta got some amount of money from her father. In how many years will the ratio of the money and the interest obtained from it be 10:3 at the rate of 6% simple interest per annum?