The weight of $65$ books is $13$ kg. What is the weight of $80$ such books?

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Solution

Weight of $65$ books $= 13$ kg

Weight of $1$ book $= \frac{13}{65}$ kg

Weight of $80$ books $= \frac{13}{65} \times 80 = 16 k g$ .

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The weight of $65$ books is $13 k g .$
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