Question

The area of a rhombus is 65 square units. The length of one diagonal is 13 units. What is the length of the other diagonal?

Answer 1

`10`

Explanation:

Area of a rhombus `A=1/2ab`, where `a and b` are the two diagonals, respectively.

Given that `A=65, and a=13`,

`=> 65=1/2*13*b`
`=> b=65*2/13=10`