Chapter 13 Surface Areas and Volumes- MCQ Online Test 2 Class 9 Maths

1. The total surface area of a cube is 96cm².
(a) 68 cm³
(b) 60 cm³
(c) 64 cm³
(d) 65 cm³

2. If the outer diameter of a pipe 21 m long is 1 m, then its curved surface area is
(a) 56 m²
(b) 60m²
(c) 62 m²
(d) 66 m²

3. A cube of side 4 cm contains a sphere touching its sides. Find the approximate volume of the gap in between.
(a) 30.48 cm³
(b) 35.18 cm³
(c) 33.40 cm³
(d) 38.41 cm³

4. The cost of digging a pit of dimensions 4.5m×2.5m×2.5m at the rate of Rs 20 per cubic metre is
(a) Rs 565
(b) Rs 562.50.
(c) Rs 563.59
(d) Rs 560.25

5. If the volume of a sphere is 4851 cm³, then its surface area is
(a) 1398 cm²
(b) 1386 cm²
(c) 1305 cm²
(d) 1374 cm²

6. The lateral surface area of a cube is 256 m² The volume of the cube is
(a) 314 m³
(b) 512 m³.
(c) 729 m³.
(d) 64 m³.

7. The cost of cementing the inner curved surface of a 14 m deep well of radius 2 m at the rate of Rs 2 per m² is
(a) Rs 360
(b) Rs 352
(c) Rs 358
(d) Rs 365

8. The ratio of the radii of two spheres whose volumes are in the ratio 64 : 27 is
(a) it is 16 : 9
(b) it is 4 : 3
(c) it is 4 : 5
(d) it is 9 : 8

9. The volume of resulting cuboid formed when two cubes each of side 6 cm are joined end to end is
(a) 435 cm³
(b) 420 cm³
(c) 432 cm³
(d) 412 cm³

10. A hemispherical bowl is made of steel 0.25 cm thick. If the inner radius of the bowl is 3.25 cm, then the outer curved surface area of the bowl is
(a) 90 cm²
(b) 77 cm²
(c) 71 cm²
(d) 81 cm²