Question

The perimeter of a rectangle is 50 cm and the length is 10cm. Find the breath and area of the

rectangle.​

Answer 1

Perimeter = 2(l+b)

50= 2(10+b)

25 = 10+b

b = 15 cm answer

Area = l×b

Area = 10×15

Area = 150 cm^2 answer

Answer 2

$\: \: \sf{perimeter \: of \: rectangle = 50cm}$

$\: \: \: \: \sf{length \: of \: rectangle = 10cm}$

$\: \: \ \sf{we \: know}$

$\boxed{ \sf \pink{perimeter \: of \: rectangle = 2(l + b)}}$

$= > \: \: \: \: \: \: \: \: \: \sf{2(10 + b) = 50}$

$= > \: \: \: \: \: \: \: \: \: \: \sf{20 + 2b = 50}$

$= > \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \sf{ \cancel{2}b = \cancel{30}}$

$= > \: \: \: \: \: \: \: \: \: \: \: \: \boxed {\sf{b = 15 \: cm}}$

$\: \: \: \: \: \: \boxed{ \sf \green{area \: of \: rectangle = l \times b}}$

$= > \: \: \: \: \: \: \: \: \: \: \: \: \: \: \sf{10 \times 15}$

$= > \: \: \: \: \: \: \: \: \: \: \: \: \: \: \boxed {\sf{150 \: cm {}^{2} }}$