Question

4 The perimeter of a rectangular plot is 90 m. The breadth of the plot is 15

m. Find its length and area​

Answer 1

Perimeter = 90 m

Breadth = 15 m

.°. Perimeter = 2(l + b)

=> 90 = 2(l + 15)

=> 90/2 = l + 15

=> 45 = l + 15

=> 45 - 15 = l

=> 30 = l

.°. l = 30 m

.°. Area

= l × b

= 30 × 15

= 450 m²

Answer 2

Answer:

perimeter of rectangle =2(l+b)

90 = 2(l+15)

90= 2l+ 30

90-30=2l

60=2l

60/2=l

30=l

length= 30m

area of rectangle= l×b

area= 30×15

area of rectangle= 450 m square