Question

The area of a rhombus is 80 $c{m}^2$ and the length of its one diagonal is 20 cm. The length of the other diagonal of the rhombus is----

• A. $8cm$
• B. $12cm$
• C. $10cm$
• D. None

Answer 1

The correct option is A $8cm$

We know that
Area of rhombus = $\frac{1}{2}\times$ (Product of the diagonals)
or 80 = $\frac{1}{2}\times 20\times d_2$
or $d_2=\frac{80\times 2}{20}cm=8cm$