Question

The length and the breadth of a rectangular Park are in the ratio 5 :3 and its perimeter is 128 find the area of a park

Answer 1

l=5x

b=3x

perimeter=128cm

2×(l+b)=128cm

2×(5x+3x)=128cm

2×8x=128cm

16x=128cm

x=128/16

x=8cm

l=5x=5 (8)=40cm

b=3x=3 (8)=24cm

Area of rectangle =l×b

=40×24

=960 cm Ans

Answer 2

let,length=5x

breadth=3x

perimeter=2(l+b)

=2(8x)=16x

16x=128

x=8

5x=40

3x=24

area=lb=40*24=960