Answer:
The area of the rectangular plot is 396 square unit.
Step-by-step explanation:
let [7p +4q ]= length of the rectangular plot. And
[ 3p+8p ] = width of the rectangular plot
given that p=2 and q=1
substitute them in the expression for the length
length=7(2)+4(1)
length=14+4
length=18units
again subject the values for p and q into the expression for the width
width=3(2)+8(2)
width=6+16
width=22units
but mathematically,
Area of a rectangular plot
= Length×width
A=L×W
given L=18units and W=22units
A=18units × 22units
A=396 square unit.