11.The cost of painting the whole surface area of a cube
at the rate of 13 paise per Sq.cm is Rs. 343.98. Then the volume of the cube is
A. 8500 cm3
B. 9000 cm3
C. 9250 cm3
D. 9261 cm3
12.A metallic sheet is of rectangular shape with
dimensions 48 m x 36 m. From each of its corners, a square is cut off so as to
make an open box. If the length of the square is 8 m, the volume of the box (in
m3) is:
A. 4830
B. 5120
C. 6420
D. 8960
13. An iron cubes of side 10 cm is hammered into a
rectangular sheet of thickness 0.5 cm. If the sides of the sheet are in the
ratio 1 : 5 the sides are
A. 10 cm, 50 cm
B. 20 cm, 100 cm
C. 40 cm, 200 cm
D. None of these
14. An iron cubes of side 10 cm is hammered into a
rectangular sheet of thickness 0.5 cm. If the sides of the sheet are in the
ratio 1 : 5 the sides are
A. 10
cm, 50 cm
B. 20 cm, 100 cm
C.
40 cm, 200 cm
D. None of these
15. The slant height of a right circular cone is 10 m and
its height is 8 m. Find the area of its curved surface.
A. 30∏ m2
B. 40∏ m2
C. 60∏ m2
D. 80∏ m2
16.The cost of the paint is Rs. 36.50 per kg. If 1 kg of
paint covers 16 squares feet, how much will it cost to paint outside of a cube
having 8 feet each side?
A. Rs. 692
B. Rs. 768
C. Rs. 876
D. Rs. 972
17. 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 on it. The mass of
man is
A. 12 kg
B. 60 kg
C.
72 kg D. 96 kg
18. The heights of a wall is six times its width and the
length of the wall is seven times its height. If volume of the wall be 16128 cu
.m, its width is
A. 4 m
B. 4.5 m
C. 5 m
D. 6 m
View Answer With Explanation
19. 66 cubic centimetres of silver is drawn into a wire 1
mm in diameter. The length of the wire in metres will be:
A. 84
B. 90
C. 168
D. 336
View Answer With Explanation
20. The heights of a wall is six times its width and the
length of the wall is seven times its height. If volume of the wall be 16128 cu
.m, its width is
A. 4 m B.
4.5 m
C.
5 m D. 6 m
