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If the cost of 12 books is Rs. 144, then what is the cost of 18 books?

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Rs. 206

Rs. 216

Rs. 198

Rs. 180

answer is B.

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Detailed Solution

Given,
The cost of 12 books

= R s .144

Dividing the cost of 12 books by the initial number of books for cost of 1 book,

14412 = R s .12

Multiplying the cost of 1 book by new number of books,
Cost of 18 books

= 12 × 18

⇒ Rs 216
Thus, the cost of 18 books is Rs 216.
Thus, option 2 is correct.

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