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Standard IX

Mathematics

Ratio and Proportion

The cost of ...

Question

The cost of $10 k g$ rice is $R s 245$ . Find the cost of $3 k g$ rice.

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Solution

Given,
The cost of $10 k g$ rice is $R s 245$
Cost of $1 k g$ rice $= R s \frac{245}{10} = R s 24.50$
Cost of $3 k g$ rice $= R s 3 \times 24.50 = R s 73.50$

Hence, cost of $3 k g$ rice is $R s 73.50$ .

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The cost of 10 kg rice is Rs 245. Find the cost of 3 kg rice.

Given, The cost of 10 kg rice is Rs 245Cost of 1 kg rice =Rs24510=Rs 24.50Cost of 3 kg rice =Rs 3×24.50=Rs 73.50Hence, cost of 3 kg rice is Rs 73.50.

The cost of $10 k g$ rice is $R s 245$ . Find the cost of $3 k g$ rice.

Given,
The cost of $10 k g$ rice is $R s 245$
Cost of $1 k g$ rice $= R s \frac{245}{10} = R s 24.50$
Cost of $3 k g$ rice $= R s 3 \times 24.50 = R s 73.50$

Hence, cost of $3 k g$ rice is $R s 73.50$ .