Mathematics is like music – Enjoy it!!!
Example 10: A hemispherical dome of a building needs to be painted (see Fig. 13.21). If the circumference of the base of the dome is 17.6 m, find the cost of painting it, given the cost of painting is `…
Read MoreExample 9: The hollow sphere, in which the circus motorcyclist performs his stunts, has a diameter of 7 m. Find the area available to the motorcyclist for riding. Example 8 Example 10
Read MoreExample 8: Find (i) the curved surface area and (ii) the total surface area of a hemisphere of radius 21 cm. Example 7 Example 9
Read MoreExample 6: A corn cob (see Fig. 13.17), shaped somewhat like a cone, has the radius of its broadest end as 2.1 cm and length (height) as 20 cm. If each 1 cm2 of the surface of the cob carries…
Read MoreExample 5: The height of a cone is 16 cm and its base radius is 12 cm. Find the curved surface area and the total surface area of the cone (Use π = 3.14). Example 4 Example 6
Read MoreExample 4: Find the curved surface area of a right circular cone whose slant height is 10 cm and base radius is 7 cm. Example 3 Example 5
Read MoreQuestion 9: A heap of wheat is in the form of a cone whose diameter is 10.5 m and height is 3 m. Find its volume. The heap is to be covered by canvas to protect it from rain. Find…
Read MoreQuestion 8: If the triangle ABC in the Question 7 above is revolved about the side 5 cm, then find the volume of the solid so obtained. Find also the ratio of the volumes of the two solids obtained in…
Read MoreQuestion 7: A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 12 cm. Find the volume of the solid so obtained. Question 6 Question 8
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