Question

The perimeter of a rectangle is 17 cm. If its width is 3​

Answer 1

Answer:

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Step-by-step explanation:

Given

Perimeter of rectangle=17cm

2(l+b)=17cm

=>2(l+3cm)=17cm

=>length +3cm=17/2

=>length =17/2-3

=11/2cm

=5.5cm

Now area =length Xbreadth

=5.5cmX3cm

=16.5cm^2

Answer 2

Answer:

It's very easy

l reresents ength

b represents width or breadth

Step-by-step explanation:

Perimeter of rectangle = 2(l+b)

Perimeter =17 cm

width = 3 cm

so, 2 ( l + 3 ) cm = 2l + 6

2l +6 = 17 cm

2l = 17-6

2l = 11 cm

l = 11/2 = 5.5cm

length = 5.5 cm then breadth is 3 cm

5.5+3 = 8.5 cm

then perimeter is 2(l+b)

2 ( 5.5 + 3 ) = 2 ( 8.5 )

17.0 cm

which is 17 cm