Question

 The length and the breadth of a rectangular plot, in meters, are x and y such that x + y = 100 and x - y = 20. The area of the plot in sq. meters is ________​

Answer 1

Answer:

solution

Step-by-step explanation:

by elimination method

x + y = 100

x - y = 20

y is eliminated

hence 2x = 120

and x=60

substitute x= 60 in eq 1

x + y = 100

60 + y =100

y= 100-60

y = 40

the area of plot = length x breath

= 60 x 40

=240m²

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