Question

the length of rectangle is 7/5of it's breadth. if its perimeter is 144m what is it's area

Answer 1

Answer:

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Step-by-step explanation:

P= 2(l+b)

144=2(7/5+x)

144=2×12/5x

144=24/5x

x=144×5/24

x=30

area=l×b

=7/5×30

=43 cm² ans

Answer 2

Let the breadth of rectangle= x
The length of it. =7x/5
It’s perimeter. =2(x+7x/5)
=2(12x/5)meter
But given perimeter = 144m
2(12x/5)=144
12x/5=144/2
12x=72x5
x=30m
It’s length =7x30/5=42m
It’s breadth=30m
It’s area= 42x30=1360m^2