Q3 of 22 Page 258

The length of the diagonal of a rhombus is 30 cm and 40 cm. Find the side of a rhombus.

As diagonals of a rhombus are equal and cut each other at right angle.


using Pythagoras theorem:


AD2 = AO2 + OD2



AD2 = 152 + 202


AD2 = 225 + 400


AD2 = 625


AD = √625


AD = 25 cm


So, side of the rhombus is 25 cm.


More from this chapter

All 22 →
1

The ratio between curved surface area and total surface area of a right circular cylinder is 2 : 3. Find ratio between height and radius of the cylinder.

 2

Total surface area of a cube is 1350sq. m. Find its volume.

 4

The circumference of the base of a right circular cylinder is 220 cm. If the height of the cylinder is 2 m find the lateral surface area of the cylinder.

 5

If the radius of a sphere is increased by 20% then the volume will be increased by.