The base of a triangle is 15 cm and height is 12 cm. The height of another triangle of double the area having the base 20 cm is

A student multiplies a number with 7.2 instead of 0.72. If due to this answer is 2592 more than the right answer, then what was the original number? 

The smallest 4- digit number which is a perfect square is 

A straight tree breaks due to storm and the broken part bends so that the top of the tree touches the ground making an angle of 30 ° with the ground. The distance from the foot of the tree to the point, where the top touches the ground is 10m. Find the total height of the tree 

Directions: Given table shows the data of population in 5 different parks. Study the data carefully and answer the questions.

By what percent female population in park D is more or less than the male population in park E?

If $${4x^2={15^2-9^2}}$$ then the value of x is

If the differernce between the reciprocal of a positive proper fraction and fraction itself be$$17\over42$$, then the fraction is:

The price of an article is cut by 33 %, to restore its original value, the new price must be increased by