numerical

Let R₁ and R₂ be the recantgular components of vector R, then

R² = R₁ ² + R₂ ²

Here, R = 100 units and R₁ = 50 units.

so, R₂ ² = R² - R₁ ²  = 7500 units.

or , R₂ = 86.6 units