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# Volume and Surface Area

1.
Find the surface area of a 10cm*4cm*3cm brick.

154 cm square
156 cm square
160 cm square
164 cm square

2.
A cistern 6 m long and 4 m wide contains water up to a breadth of 1 m 25 cm. Find the total area of the wet surface.

42 m sqaure
49 m sqaure
52 m sqaure
64 m sqaure

3.
A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets into it. The mass of the man is :

40 kg
60 kg
50 kg
30 kg

4.
How many bricks, each measuring 25cm*11.25cm*6cm, will be needed to build a wall 8m*6m*22.5m

6100
6300
6500
6400

5.
A swimming pool 9 m wide and 12 m long is 1 m deep on the shallow side and 4 m deep on the deeper side. Its volume is:

240
250
270
280

6.
The cost of the paint is Rs. 36.50 per kg. If 1 kg of paint covers 16 square feet, how much will it cost to paint outside of a cube having 8 feet each side.

880
870
876
875

7.
How many cubes of 10 cm edge can be put in a cubical box of 1 m edge.

100 cubes
1000 cubes
10 cubes
1 cubes

8.
66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length if the wire in meters will be:

80 m
76 m
84 m
83 m

9.
The slant height of a conical mountain is 2.5 km and the area of its base is 1.54 km square. The height of mountain is :

2.5 km
2.4 km
2.6 km
2.7 km

10.
The radii of two cones are in ratio 2:1, their volumes are equal. Find the ratio of their heights.

1:4
1:3
1:7
1:2

11.
The surface area of a sphere is same as the curved surface area of a right circular cylinder whose height and diameter are 12 cm each. The radius of the sphere is:

5 cm
6 cm
2 cm
4 cm

12.
12 spheres of the same size are made from melting a solid cylinder of 16 cm diameter and 2 cm height. Find the diameter of each sphere.

4 cm
5 cm
6 cm
7 cm