1. Suresh, who runs a bakery, uses a conical shaped equipment to write decorative labels (e.g., Happy
Birthday etc.) using cream. The height of this equipment is 7 cm and the diameter of the base is 5 mm. A full charge of the equipment will write 330 words on an average. How many words can be written using three fifth of a litre of cream?
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By: anil on 05 May 2019 02.37 am
Height = 7 cm and Radius = 0.25 cm Volume of cone = $$frac{1}{3} pi r^2 h$$ = $$frac{1}{3} imes frac{22}{7} imes (0.25)^2 imes 7 = 0.458 cm^3$$ $$ecause$$ $$0.458 cm^3$$ can write $$330$$ words => $$1 cm^3$$ can write = $$frac{330}{0.458} = 720.05$$ words Now, $$1$$ litre = $$1000 cm^3$$ => $$frac{3}{5}$$ litre = $$frac{3}{5} imes 1000 = 600 cm^3$$ $$ herefore$$ $$600 cm^3$$ can write = $$600 imes 720.05$$ $$approx 4,32,000$$ words
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