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Find the area to be painted in the follo...

Find the area to be painted in the following block with a cylindrical hole. Given that length is 15 cm, width 12 cm, height 20 cm and radius of the hole 2.8 cm.

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NCERT EXEMPLAR-MENSURATION-EXERCISES
  1. A wooden box (including the lid) has external dimensions 40 cm by 34 ...

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  2. A river 2 m deep and 45 m wide is flowing at the rate of 3 km per hour...

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  3. Find the area to be painted in the following block with a cylindrical ...

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  4. A truck carrying 7.8 m3 concrete arrives at a job site. A platform of ...

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  5. A hollow garden roller of 42 cm diameter and length 152 cm is made of ...

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  6. Three cubes each of side 10 cm are joined end to end. Find the surface...

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  7. Below are the drawings of cross sections of two different pipes used t...

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  8. A swimming pool is 200 m by 50 m and has an average depth of 2 m. By t...

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  9. A housing society consisting of 5,500 people needs 100 L of water per ...

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  10. Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to ob...

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  11. The ratio of the radius and height of a cylinder is 2:3. If its volume...

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  12. External dimensions of a closed wooden box are in the ratio 5:4:3. If ...

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  13. The capacity of a closed cylindrical vessel of height 1m is 15.4 li...

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  14. What will happen to the volume of the cube, if its edge is (a) triple...

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  15. A rectangular sheet of dimensions 25 cm xx 7 cm is rotated about its l...

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  16. From a pipe of inner radius 0.75 cm, water flows at the rate of 7 m pe...

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  17. Four times the area of the curved surface of a cylinder is equal to 6 ...

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  18. A cylindrical tank has a radius of 154 cm. It is filled with water to ...

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  19. The length, breadth and height of a cuboidal reservoir is 7m, 6m an...

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  20. How many bricks of size 22 c m\ x\ 10 c m\ x\ 7c m are required to con...

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