Question

The barrel of a fountain pen, cylindrical in
shape, is 7 cm long and 5 mm in diameter.
A full barrel of ink in the pen is used up on
writing 3300 words on an average. How
many words can be written in a bottle of ink
containing one fifth of a litre? ​

Answer 1

this is your answer

hope it's help you

Answer 2

$\underline\red{\bold{Answer =48000}}$

Step-by-step explanation:

$\underline\red{\bold{Given :-}}$

$\textsf{Length = 7cm}$

$\textsf{diameter = 5mm}$

$\textsf{Volume of a barrel=}$

$\LARGE\frac{22}{7}$ × 0.25 × 0.25

$= 1.375 {cm}^{3}$

$\textsf{Volume of ink in the bottle=}$

$\LARGE\frac{1}{5}$$litre = \LARGE\frac{1000}{5}$

$= 200 {cm}^{3}$

$\textsf{Therefore, total number of barrels that can}$

$\textsf{be filled from the given volume of ink ,}$

$= \Large\frac{200}{1.375}$$\times 330$

$= 48000$

$\underline\red{\bold{More \: information :-}}$

• The volume V of a cylinder with radius r is the area of the base B times the height h .

• $\textsf{V = Bh or V = πr²h}$