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Question
It takes 17 full specific type of trees to make one tonne of paper. If there are 221 such trees in a forest, then what fraction of forest will be used to make to save `7/13` part of the forest how much of paper we have to save.
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Solution
`7/13` part of forest = `7/13 xx 221` trees = 119 trees
∴ Number of tonnes of paper which can be made by 119 trees = `119/17` = 7
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