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The ratio of the areas of two triangles ...

The ratio of the areas of two triangles `A_(1):A_(2)` is `3:2`. The corresponding bases are `b_(1)` and `b_(2)`. The height of the triangles are equal. If `b_(2)=12cm`. Find `b_(1)`.

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The correct Answer is:
`b_(1)=18cm`
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