Question

The area of a rhombus is 120 cm${}^2$. If one of the diagonals is 12 cm, other diagonal of the rhombus is .

• A. 10 cm
• B. 20 cm
• C. 15 cm

Answer 1

The correct option is B 20 cm

Given: Diagonal = 12 cm and area of the rhombus = 120 cm${}^2$
Let the length of other diagonal = x

Area of the rhombus = $\frac{1}{2}\times$ Product of diagonals
120 = $\frac{1}{2}\times 12\times x$
x = 20 cm
So, the other diagonal is 20 cm.