Question

The barrel of fountain pen ,cylindrical in shape , is 7cm long and 5mm in dia. A full barrel of pen is used up on writing 3300 words on an average . How many words can be written in a bottel of ink containing 1/5 of a litre ?

Answer 1

Sorry for the cutting done in middle part ...

1/5 of a litre means 1/5litre and this much ink will write 480000 words.

Answer 2

Answer:

480000 words

Step-by-step explanation:

Diameter of barrel = 5 mm = 0.5 cm

Radius = $\frac{0.5}{2}=0.25 cm$

Height = 7 cm

Volume of cylindrical barrel = $\pi r^2 h = \frac{22}{7} \times 0.25^2 \times 7 = 1.375 cm^3$

So, 1.375 cubic cm  can write words = 3300

1 liter = 1000 cubic cm

1/5 liter = 200 cubic cm

200 cubic cm can write words = $\frac{3300}{1.375} \times 200=480000$

Hence 480000 words can be written in a bottel of ink containing 1/5 of a liter