Given
Cost of $$25$$ articles $$=$$ Rs $$218.25$$
Cost of one article can be calculated as below
Cost of $$1$$ article $$= \dfrac{218.25}{25}$$
$$=\dfrac{21825}{25 × 100}$$
We get,
$$= \dfrac{873}{100}$$
$$= Rs 8.73$$
Therefore, the cost of one article is Rs $$8.73$$