Question

Area of the ellipse $\frac{x^2}{25}+\frac{y^2}{16}=1$ is given by

• A. $25\pi$ sq. units
• B. $20\pi$ sq. units
• C. $4\pi$ sq.units
• D. $5\pi$ units

Answer 1

The correct option is B $20\pi$ sq. units

Given equation of ellipse is $\frac{x^2}{25}+\frac{y^2}{16}=1$

Area of an ellipse is given by

$\pi \cdot$semi major axis $\cdot$ semi minor axis $=\pi \cdot 5\cdot 4=20\pi$ sq. units