** Question No : 8**

**A cube of edge 15 cm is immersed completely in a rectangular vessel containing water. If the dimensions of the base of vessel are 20 cm x 15 cm, find the rise in water level.**

10 cm

10.25 cm

11 cm

11.25 cm

** Question No : 9**

**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 cm^{2}.

488cm^{2}.

479 cm^{2}.

445 cm^{2}.

** Question No : 10**

**Two cubes have their volumes in the ratio 1 : 27. Find the ratio of their surface areas. **

1:2

2:3

2:5

1:9

** Question No : 11**

**How many iron rods, each of length 7 m and diameter 2 cm can be made ****out of 0.88 cubic meter of iron?**

200

330

400

450

** Question No : 12**

**A conical vessel, whose internal radius is 12 cm and height 50 cm, is full of liquid. The contents are emptied into a cylindrical vessel with internal radius 10 cm. Find the eight to which the liquid rises in the cylindrical vessel.**

20 cm

21 cm

23 cm

24 cm