Q11. 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. 8960
C. 5120
D. 6420
Q12. If the areas of the three adjacent faces of a cuboidal box are 120 sq cm , 72 sq cm and 60 sq cm respectively , then find the volume of the box.
A. 864
B. 720
C. 6500
D. 7200
Q13. A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is:
A. 1200
B. 1800
C. 900
D. 720
Q14. A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:
A. 1 m
B. 10 cm
C. 90 cm
D. 1.1 m
Q15. How many cubes of 10 cm edge can be put in a cubical box of 1 m edge ?
A. 1000
B. 10000
C. 10000
D. 10
Q16. How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm ?
A. 7200
B. 6000
C. 6400
D. 5600
Q17. If a metallic cuboid weighs 16kg,how much would a miniature cuboid of metal weigh, if all dimensions are reduced to one-fourth of the original ?
A. 0.50 kg
B. 1 kg
C. 0.25 kg
D. 0.75 kg
Q18. A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube ?
A. 2 : 1
B. 3 : 2
C. 27 : 20
D. 25 : 18
Q19. How many cubes of 3 cm edge can be cut out of a cube of 18 cm edge ?
A. 432
B. 216
C. 218
D. 36
Q20. The height of the wall is 6 times its width and length of the wall is 7 times its height .if the volume of the wall be 16128 cu.m.its width is:
A. 4 m
B. 6 m
C. 4.5 m
D. 5 m