Trying to find the right answer to this..

Solution not provided. Ans. 7 cm, 332.5 cm 2

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Surface Areas and Volumes

Short Answer Type

491. A spherical copper shell, of external diameter 18 cm, is melted and recast into a solid cone of base radius 14 cm and height

4 3 over 7 space cm.

Find the inner diameter of the shell.

981 Views

492. A farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank in his field, which is 10 m in diameter and 2 m deep. If water flows through the pipe at the rate of 6km/h, in how much time will the tank be filled?

401 Views

493. A cubical block of side 7 cm is surmounted by a hemisphere. What is the greatest diameter the hemisphere can have ? Find the surface area of the solid.

Solution not provided.

Ans. 7 cm, 332.5 cm²

127 Views

494. Three cubes each of side 5 cm are joined end to end. Find the surface area of the resulting cuboid.

133 Views

495. Two cubes each of volume 64 m³ are joined end to end. Find the surface area and volume of the resulting cuboid.

128 Views

496. Three cubes of side 6 cm are joined end to end. Find the surface area of the resulting cuboid.

116 Views

497. A piece of metal in the form of a cone of diameter 2 cm and height 9 cm is melted and recast into a cylinder of radius 1 cm. Find the height of the cylinder.

194 Views