Question

25 cm
2. Find the length of the rectangle if the perimeter and width are
(i) Perimeter = 86 cm, width = 18 cm
(ii) Perimeter = 128 cm, width = 25 cm
(iii) Perimeter = 151 cm, width = 29.5 cm
please help​

Answer 1

Answer:

Hope it will help you..

Answer 2

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Perimeter of Rectangle = $2 × ( length + width)$

(i) Perimeter = 86 cm, width = 18 cm

==> $\text {2 × ( length + width) = 86cm}$

==> $\text {2 × ( length + 18 ) = 86cm}$

==> $\text{length =} \frac {86}{2} -18$

==> $\text {length = 25}$