Each side of an equilateral triangle is 4 cm. What will be its area?

A dealer sold an article at a loss of 2%. Had he sold it for ₹44 more, he would have gained 20%. Find the cost price of the article.

A sum of money at compound interest doubles itself in 15 years. It will become eight times of itself in

On a certain sum of money, the simple interest for 2 years is ₹150 at the rate of 10% per annum. What is the difference between the compound interest and the simple interest for 2 years if, in the case of compound interest, interest is compounded annually at the rate of 10% per annum.

A lends 2500 to B and a certain sum to C at the same time at 7% annual simple interest. If after 4 years, A altogether receives 1120 as interest from B and C, the sum lent to C is-

Solve: 12–[26–{2+5×(6–3)}]

A dealer sells an article for ₹ 24 and gains as much percent as the price of the article , then the cost price of the article is: 

A sum triple itself in 9 years at simple interest. Find the rate of interest per annum is.