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Q.

The barrel of a fountain pen, cylindrical in shape, is 7cm long and 5mm in diameter. A full barrel of ink in the pen will be used upon writing 330 words on an average. How many words would use up a bottle of ink containing one fifth of a liter?


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a

 48000

b

 49000

c

 50000

d

 51000 

answer is A.

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Detailed Solution

Concept: Calculate the provided cylinder's volume first, then convert the result to liters. Thus, to determine how many words may be printed on one fifth of a liter of ink, use the cross-multiplication approach to multiply the number of liters needed for a particular number of words. This is the outcome you must achieve.
The barrel's height = h= 7cm
The barrel’s radius =r=2.5mm=0.25 cm
The barrel’s volume = Question ImageQuestion ImageIt takes Question Image of ink to write 330 words.
Number of words that can be written with 1/5 th of liter,
Question ImageHence, the correct option is 1.
 
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