Question:In rhombus whose area is 144 sq. cm, one of its diagonal is twice as long as the other. The lengths of its diagonal are : 

A `12 cm, 24 cm` 
B `6 cm, 12 cm` 
C `24 cm, 48 cm` 
D `18 cm, 32 cm` 

+ Answer
A 

+ Explanation
Let the diagonals be x and 2x cm.

Then,` 1/2 (x xx 2x) = 144 or x = 12.`

:. Diagonal are 12 cm and 24 cm.

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Irin Moni

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