Question

if the length and breadth of the rectangle is in the ratio is 7 is to 2 if the perimeter equal 72 what is the area ​

Answer 1

Answer:

let the ratio be 7x and 2 x

perimeter = 2(L+B)

72 = 2( 7x+2x)

72= 2(9x)

72 = 18x

72/18= x

4 = x

length = 7x = 7×4= 28

breadth = 2x= 2×4= 8

Area = length × breadth

= 28× 8 = 224

Answer 2

Answer:

Step-by-step explanation:let the ratios be 7x,2x

length and breadth of a rectangle are in ratio 7:2

perimeter =72

2(l+b)=72

2(7x+2x)=72

2(9x)=72

18x=72

x=72/18

x=4cm

so,

length=7x=7×4=28cm

breadth=2x=2×4=8cm

area =l×b

=(28×4)cm²

=112cm²