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प्रश्न
Rakesh can do a piece of work in 20 days. How much work can he do in 4 days?
उत्तर
\[ \text{ It is given that Rakesh can do a piece of work in 20 days } . \]
\[ \therefore \text{ Rakesh's 1 day's work } = \frac{1}{20}\]
\[ \therefore \text{ Rakesh's workfor 4 days } = \frac{4}{20} = \frac{1}{5}\]
\[ \text{ Thus, he can do } \frac{1}{5}\text{ th of the work in 4 days } . \]
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