Surface Areas a...

If the volume and surface area of a sphere are numerically the same, then its diameter is

The radii of two sphere are in the ratio $$3:4$$. The ratio of their surface area is:

The volume of a sphere of radius $$\pi$$ cm is ________ cc.

The total surface area of a closed cylindrical petrol storage tank whose diameter $$4.2$$ m and height $$4.5$$ m.

A closed water tank has an internal size of $$10m \times 15m \times 20m$$. It needs to be lined with waterproofing cement on all its internal sides. At the rate of Rs. $$250\  \text {per} \ m^2$$, the total cost of lining will be Rs:

A building has $$25$$ cylindrical shaped poles. Each has a radius of $$28$$ cm and a height of $$4$$ cm. Find the cost of painting curved surface of all poles at the rate of Rs. $$8$$ per $$m^2$$.

From a solid sphere of radius $$R$$, a concentric solid sphere of radius $$\dfrac{R}{2}$$ is removed. The total surface area increases by

Area of the four walls of a big room measuring $$25\ m \times 18\ m\times 10\ m$$ is

A sphere has volume $$36\pi\ cm^{3}$$, find the radius of the sphere

Which of the following is the formula for the volume of the cubiod