The perimeter of a rectangle is 30 m. and the ratio of its length and breadth is 7 : 3; The area of that rectangle will be
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perimeter of rectangle =30m
Ratio of length & bredath=7:3
let the ratio of length & breadth be 7x & 3x
perimeter of rectangle =2(l+b)=30
=2(7x+3x)=30
=2×10x=30
=20x=30
=x= 30/20
x=3/2=1.5
new length=1.5×7=10.5
new breadth=1.5×3=4.5
area =l×b
=(10.5×4.5)
=47.25 Answer
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