If the cost of $6$ cans of juice is $R s 180$ , then:
Cost of $9$ cans of juice is $R s_____$

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Solution

Given that,
Cost of $6$ cans of juice $=$ $R s 180$
By unitary method,
Divide both side by $6$
Cost of $1$ can of juice $=$ $\frac{R s 180}{6} = R s 30$
Multiply both side by $9$
Cost of $9$ cans of juice $=$ $R s 30 \times 9 = R s 270$
Hence, Cost of $9$ cans of juice is $R s 270$ .

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