The area of a triangle whose sides are a, b and c is ________

(a)

\(\sqrt { \left( s-a \right) \left( s-b \right) \left( s-c \right) } \)sq. units

(b)

\(\sqrt { s\left( s-a \right) \left( s-b \right) \left( s-c \right) } \)sq. units

(c)

\(\sqrt { s\left( s\times a \right) \left( s\times b \right) \left( s\times c \right) } \)sq. units

(d)

\(\sqrt { s\left( s-a \right) \left( s-b \right) \left( s-c \right) } \) sq. units

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

(a)

3 cm²

(b)

6 cm²

(c)

9 cm²

(d)

12 cm²

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

(a)

\(10\sqrt { 3 } \) cm²

(b)

\(12\sqrt { 3 } \) cm²

(c)

\(15\sqrt { 3 } \) cm²

(d)

\(25\sqrt { 3 } \) cm ²

The total surface area of a cuboid is ______________

(a)

4a² sq. units

(b)

6a² sq. units

(c)

2(l + b)h sq. units

(d)

2(lb + bh + lh) sq. units

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

(a)

144 cm²

(b)

196 cm²

(c)

576 cm²

(d)

664 cm²

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

(a)

150 cm²

(b)

400 cm²

(c)

900 cm²

(d)

1350 cm²

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

(a)

280 cm²

(b)

300 cm²

(c)

360 cm²

(d)

600 cm²

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

(a)

4 : 6

(b)

4 : 9

(c)

6 : 9

(d)

16 : 36

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

(a)

10 cm

(b)

12 cm

(c)

20 cm

(d)

22 cm

The capacity of a water tank of dimensions 10 m × 5 m × 1.5 m is _______.

(a)

75 litres

(b)

750 litres

(c)

7500 litres

(d)

75000 litres