Question

Area of a rhombus is $60c{m}^2$ . Find the length of a diagonal if the length of the other diagonal is 10 cm.

• A. 6 cm
• B. 12 cm
• C. 15 cm
• D. 24 cm

Answer 1

The correct option is B 12 cm

Area of Rhombus = $\frac{1}{2}\times d_1\times d_2$

Where $d_1$ and $d_2$ are the two diagonals of the rhombus.​

Let $d_1=10cm$

Then, $60=\frac{1}{2}\times 10\times d_2$

$d_2=\frac{(60\times 2)}{10}$

$=\frac{120}{10}$

$=12cm$

​

Answer: (B) 12 cm​