Question

3. If the Perimeter of a
rectangle is 38 cm and Area 84
Sq. cm. Find the lengths of its
sides ?​

Answer 1

Step-by-step explanation:

parameter=38=2(l+b)

L+B = 19. (1)

area = L*B=84. (2)

from first and second

L+84/L=19

$l ^{2} - 19l + 84$

$l {}^{2} - 12l - 7l + 84$

L(L-12)-7(L-12)

L=7,12

similarly

B=12,7