$\"\"$

From the diagram height and base of the parallelogram are 3 m and 10 m respectively.

Area of the parallelogram is $\"\"$

$\"\"$

$\"\"$ (Subdtitute 10 for b and 3 for h)

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

The area of the parallelogram is 30 $\"\"$