Question

If the ratio of the length to the breadth of rectangle 5 : 3 and its perimeter is 144m,find the length of the rectangle

Answer 1

Let the length be 5x and breadth be 3x.
A.T.Q.
2(5x + 3x) = 144
16x = 144
x = 9
Length of rectangle = 5x = 5 * 9
=45m

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Answer 2

sum of the ratio 5:3
= 5+3
=8
so,
5\8×144
=5×18
=90
again,
3/5×144
=3×18
=54
Now,
perimeter of rectangle=2(l+b)
=2(90+54)
=2×1026
=2052m
I hope it will help you