Twice the square of a number is three times the cube of other number. What is the ratio between the first number and the second number? 

In 80 litres mixture of milk and water the ratio of amount of milk to that of amount of water is 7: 3. In order to make this ratio 2: 1, how many litres of water should be added?

A sector area of 4%   is removed from a circular sheet of paper of diameter 50 cm, If the remaining part is used to make a conical surface , then the ratio of radius and height of the-

A, B and C alone can complete a piece of work in 24, 36 and 18 days respectively. A started working, after 2 days C joins with them and B joins with them after another 2 days, then find the no of days A, B and C worked together.

The perimeter of five squares are 24 cm, 32 cm, 40 cm, 76 cm and 80 cm respectively. The perimeter of another square equal in area to sum of the areas of these squares is: 

In what time will ₹ 72 become ₹ 81 at $$6{1\over4}$$ % per annum simple interest?

In a class, 60% speak Hindi and 70% speak English. If 28% of the students can’t speak any of the two languages, then what % of the students in the class can speak both the languages?

What is the area of an equilateral triangle having altitude equal to $$5\sqrt{3}$$cm.