In a regular polygon, the exterior and interior angles are in the ratio 1 : 4. The number of sides of the polygon is 

One acute angle of a right-angled triangle is double the other. If the length of its hypotenuse is 10 cm, then its area is

If Diagonal of rectangle is 41 cm and one side of Rectangle is 9 cm Then find out Ratio of perimeter and area of Rectangle? 

If the height of a given cone be doubled and radius of base remains the same, the ratio of the volume of the given cone to that the second cone will be -

Find the cost in rupees for carpeting a room 65dm× 30 dm at Rs. 45 per sq.m

If the perimeter of a rhombus is 80 cm and one of its diagonals is 24 cm, then what is the are (in cm²) of the rhombus?

The sides of a triangle are in the ratio of 7: 9 : 12. The difference between the lengths of largest and smallest sides is 15 cm . The length of the largest sides would be: 

The area ( in m² ) of the square which has the same perimeter as a rectangle whose length is 48 m and is 3 times its breadth is :