Question

The perimeter of a rectangle is 30m.its length is 10m. Its breath is

Answer 1

Answer:

hope it will help you

Step-by-step explanation:

Letthebreadth=xcm

length=x+10

Perimeter=80m

2(l+b)=80m

l+b=40

x+10+x=40

x=15cm

then,length=15+10=25

l=25cm

Dimension(l,b)=(25cm,15cm)

area=l×b

=25×15

=375cm

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Answer 2

Answer:

5m

Step-by-step explanation:

length = l & breath = b

l = 10 & b =?

perimeter of rectangle = 30

perimeter of rectangle =2( l + b)

30 =2( 10 + b )

30 = 20 +2b

30 - 20 =2b

10=2b

• 10/2=b
• 5=b

b=5

breath of rectangle is 5m