#### Mensuration English Medium Free Online Test 1 Mark Questions 2020-2021

9th Standard

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Maths

Time : 00:10:00 Hrs
Total Marks : 10

Part A

10 x 1 = 10
1. 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

2. 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

3. 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

4. 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

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

(a)

144 cm2

(b)

196 cm2

(c)

576 cm2

(d)

664 cm2

6. 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

7. 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

8. 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

9. 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

10. 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