1. Three solid iron cubes of edges 4 cm, 5 cm and 6 cm are melted together to make a new cube. 62 cm3 of the melted material is lost due to improper handling. The area (in cm2) of the whole surface of the newly formed cube is

216

294

343

125

2. If the ratio of volumes of two cones is 2 : 3 and the ratio of the radii of their bases is 1 : 2, then the ratio of their heights will be

8 : 3

3 : 4

4:3

3: 8

3. A right pyramid stands on a base 16 cm square and its height is 15 cm. The area (in cm2) of its slant surface is

444

514

544

344

4. If a chord of a circle is equal to the radius of the circle, then the angle subtended by the chord at a point on the minor arc is

30°

150°

60°

120°

5. The length of  40√2 each side of a rhombus is equal to the length of the side of a square whose diagonal is cm. If the lengths of the diagonals of the rhombus are in the ratio 3 : 4, then its area (in cm2) is

1536

1550

1600

1535

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