Question

The breadth of a rectangle is 4/5 of its length .If the perimeter of the rectangle is 180 cm, then find its length and breadth

Answer 1

Step-by-step explanation:

perimeter of the rectangle=2(L+B)

=180

2(L+B) =180

L+B =180/2

=90 Let the length of the rectangle be x m.

Then, width of the rectangle = 4x/5

Given, perimeter of the rectangle =180

⟹2((x+ (4x/5)=180

⟹2( (5x+4x)/5)=180

⟹2(9x)=180×5 ....[By cross-multiplication]

⟹18x=900

⟹x=50

Now, breadth of the rectangle = 4x/5

=(4×50)/5

=40 m

Hence, the length of the rectangle is 50 m and that of breadth is 40m.

therefore,L+B=50+40=90

Answer 2

Answer:

3000m^2

Step-by-step explanation:

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