S.N. Chhibber Solutions for Chapter: Surface Area and Volume of Solids, Exercise 2: Exercise

$3.08 \mathrm{cubic} \mathrm{meters}$ of copper is drawn into a wire of radius $1.4 \mathrm{cm}$. Find the length of wire (in $\mathrm{km}$) so formed.

The ratio of the curved surface area to the total surface area of right circular cylinder is $3:5$. Find the ratio of the height to the radius of the cylinder.

The radii of two cylinders are in the ratio $2:3$ and their heights are in the ratio $9:4$. Calculate the ratio of their volumes.

A hollow cylindrical pipe is $35 \mathrm{m}$ long. Its outer and inner diameters are $16 \mathrm{cm}$ and $14 \mathrm{cm}$ respectively. Find the volume of metal (in ${\mathrm{m}}^3$) used in making the pipe.

A well of radius $7 \mathrm{m}$ is dug to a depth of $12 \mathrm{m}$. Earth taken out of it has been evenly spread all around to form a circular embankment of width $7 \mathrm{m}$. iF the height of the embankment is $k$ meter then $k=$

A well of radius $175 \mathrm{cm}$ is dug of $20 \mathrm{m}$. How many $\mathrm{cubic} \mathrm{meters}$ of earth are dug out? Find the cost of plastering the internal curved surface at$₹20 \mathrm{per} \mathrm{sq}. \mathrm{m}$.

A pencil consists of a cylinder of wood with solid cylinder of graphite filled into it. The diameter of pencil is $8 \mathrm{mm}$ and the diameter of the graphite is $1 \mathrm{mm}$. If the length of the pencil is $14 \mathrm{cm}$, find the volume of the graphite in ${\mathrm{mm}}^3$.

A pencil consists of a cylinder of wood with solid cylinder of graphite filled into it. The diameter of pencil is $8 \mathrm{mm}$ and the diameter of the graphite is $1 \mathrm{mm}$. If the length of the pencil is $14 \mathrm{cm}$, find the volume of wood in ${\mathrm{mm}}^3$