What will be the compound interest of Rs 160000 payable half yearly at 10% per annum in 2 years?

Piyush formed a larger cube from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?

If the length of a rectangle is increased by 20% and its breadth is decreased by 20%, its area:

The ratio of investment by A to that by B in a business is 14 : 15 and the ratio of their respective profit at the end of a year is 2 : 5. If A invested the money for 3 months, then for how much time ( in months) B invested his money?

In a class, there are ' z ' students. Out of them ‘x’ are boys. What part of the class is composed of girls? 

The marked price of an article is Rs 200. A profit of 25% is also earned by giving a discount of $$60{1\over2}\%$$ on the marked price. What is the cost price of that article?

The difference between the compound and the simple interest on a sum for 2 years at 10 % per annum , when the interest is compounded annually, is Rs.28. If the yearly interest were compounded half yearly, the difference in the two interests will be 

The perimeter of a circle is equal to the square perimeter. What will be the ratio of their areas?