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

• 6cm²

• 9cm²

• 12cm²

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

• 10√3 cm²

• 12√3 cm²

• 15√3 cm²

• 25√3 cm²

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

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 × 5 m × 1.5 m is

• 75 litres

• 750 litre

• 7500 litres

• 75000 litres

The total surface area of a cuboid with dimension 10 cm × 6 cm × 5 cm is

• 280 cm²

• 300 cm²

• 360 cm²

• 600 cm²

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

• 1000

• 2000

• 3000

• 5000