Class 9 EM Mensuration

The semi-perimeter of a triangle having sides 15 cm, 20 cm and 25 cm is

• 60 cm

• 45 cm

• 30 cm

• 15 cm

If the sides of a triangle are 3 cm, 4 cm and 5 cm, then the area is

• 3 cm²

• 6 cm^2

• 9 cm²

• 12 cm²

The perimeter of an equilateral triangle is 30 cm. The area is

• 10 $\sqrt{3}$ $cm^2$

• 12 $\sqrt{3}$ $cm^2$

• 15 $\sqrt{3}$ $cm^2$

• 25 $\sqrt{3}$ $cm^2$

The lateral surface area of a cube of side 12 cm is

• 144 cm²

• 196 cm²

• 576 cm²

• 664 cm²

If the lateral surface area of a cube is 600 cm², then the total surface area is

• 150 cm²

• 400 cm²

• 900 cm²

• 1350 cm²

The total surface area of a cuboid with dimension 10 cm  $\times$  6 cm  $\times$  5 cm is

• 280 $cm^2$  
  

• 300 $cm^2$  
  

• 360 $cm^2$  
  

• 600 $cm^2$  
  

If the ratio of the sides of two cubes are 2:3, then ratio of their surface areas will be

• 4 : 6

• 4 : 9

• 6 : 9

• 16 : 36

The volume of a cuboid is 660 cm³ and the area of the base is 33 cm². Its height is

• 10 cm

• 12 cm

• 20 cm

• 22 cm

The capacity of a water tank of dimensions 10 m  $\times$  5 m  $\times$  1.5 m is

• 75 litres
  

• 750 litres
  

• 7500 litres
  

• 75000 litres
  

The number of bricks each measuring 50 cm  $\times$  30 cm  $\times$  20 cm that will be required to build a wall whose dimensions are 5 m  $\times$  3 m  $\times$  2 m is

• 1000

• 2000

• 3000

• 5000