Question

Find the length of the rectangular field whose perimeter is 90 metres and breadth is
20 metres.
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Answer 1

2(l+b)=Perimeter

2(l+20)=90

2l+40=90

2l=90-40

2l=50

l=50÷2

l=25 metres

Answer 2

Answer:

25 metres

Step-by-step explanation:

perimeter of rectangle is 2(l+b)

here perimeter of rectangle is 90m and breadth is 20m

then 90=2(l+20)

(90/2)=l+20

45=l+20

l=45-20

l=25