Mathematics
An iron pole consisting of a cylindrical portion 110 cm high and of base diameter 12 cm is surmounted by a cone 9 cm high. Find the mass of the pole, given that 1 cm<sup>3</sup> of iron has 8 gm of mass (approx). (Take π = )
Related Questions
The diameter of a sphere is 6 cm. It is melted and drawn into a wire of diameter 0.2 cm. Find the length of wire.
Determine the ratio of the volume of a cube to that of a sphere which will exactly fit inside the cube.
The cross-section of a tunnel is a square of side 7 m surmounted by a semicircle as shown in the adjoining figure. The tunnel is 80 m long. Calculate:
(i) its volume,
(ii) the surface area of the tunnel (excluding the floor) and
(iii) its floor area.
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