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 will be used up when writing 310 words on an average. How many words would use up a bottle of ink containing one-fifth of a litre? Answer correct to the nearest 100 words

Answer 1

7 cm = 7/10 dm = h
5mm=5/100 dm= r
volume=22/7 rr h
...find volume
...the volume will be in dm cube . 1 dm cube = 1 litre


volume will be = 55/ 10000 litre

so, 55/10000 litre = 310 word

so, 1 litre =

so, 1/5 litre = ...


DONE...

Answer 2

therefore 480000 words can written by 1/5 of liter of ink bottle