Q. 174.5( 8 Votes )

# 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 on writing 33o words on an average. How many words would use up a bottle of ink containing one-fifth of a litre?

Answer :

Given,

Length of cylindrical barrel (h) = 7 cm

Diameter = 5 mm

Radius =

Volume of cylindrical barrel = πr^{2}h =

∵ cm^{3} volume of barrel is used for writing = 330 words

∴ will be used for writing =

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