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Find the area of a rhombus whose side is 6 cm and whose altitude is 4 cm. If one of its diagonals is 8 cm long, find the length of the other diagonal.

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Area of a parallelogram=base×height`=6×4=24cm^2`
Area of a rhombus`=1/2 xx d xx D`
`24=1/2 xx 8 xx D`
`D=6`
Hence, other length is `6 cm`.
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