| 1. | How many cubes of 3cm edge can be cut out of a cube of 18cm edge ? | |
|
36
|
||
|
232
|
||
|
216
|
||
|
484
|
||
View Answer
Discuss in Forum
Report Question| 2. | 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 ? | |
|
2 : 1
|
||
|
3 : 2
|
||
|
25 : 18
|
||
|
27 : 20
|
||
| 3. | If each edge of a cube is increased by 50%, find the percentage increase in Its surface area ? | |
|
125%
|
||
|
150%
|
||
|
175%
|
||
|
110%
|
||
| 4. | If radius and height of a cylinder increase by 20% and15% respectively. then what is the % change in curved surface area ? | |
|
41%
|
||
|
38%
|
||
|
33%
|
||
|
44%
|
||
| 5. | A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is ? | |
|
Rs. 456
|
||
|
Rs. 458
|
||
|
Rs. 558
|
||
|
Rs. 568
|
||
| 6. | If the radius of base and height of a cone are increased by 10%, find the percentage of increase of its volume ? | |
|
33.5%
|
||
|
33.1%
|
||
|
32.1%
|
||
|
53.1%
|
||
| 7. | The height of the wall is 6 times its width and lenght of the wall is 7 times its height .if the volume of the wall be 16128 cu.m.its width is ? | |
|
4m
|
||
|
5m
|
||
|
6m
|
||
|
7m
|
||
| 8. | What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm ? | |
|
344.35 sq.cm
|
||
|
462 sq.cm
|
||
|
498.35 sq.cm
|
||
|
None of these
|
||
| 9. | Find the length of the longest pole that can be placed in a room 12 m long 8m broad and 9m high ? | |
|
14m
|
||
|
15m
|
||
|
16m
|
||
|
17m
|
||
| 10. | Three solid cubes of sides 1 cm, 6 cm and 8 cm are melted to form a new cube. Find the surface area of the cube so formed ? | |
|
486
|
||
|
586
|
||
|
686
|
||
|
786
|
||