Question

If perimeter of a rectangle is 40 cm and length is
12 cm, then its breadth is
(a) 38 cm(b) 8 cm (c) 16 cm (d) 40 cm.​

Answer 1

P=2(l+w)

$w = \frac{p}{2} - l$

$= \frac{40}{2} - 12$

$= 8cm$

Answer 2

Answer:

Perimeter= 2x(l+b)

40= 2x(12+b)

20= 12+b

b= 20-12= 8

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