Question

find the perimeter of a rectangle whose area is 1200cm² and breadth is 30cm​

Answer 1

area/breadth = length = 1200/30 = 40 cm

perimeter = 2L + 2B = 140 cm

Answer 2

Step-by-step explanation:

area = l×b

1200sq.cm = 30× l

1200/30 = l

40cm = l

perimeter = 2(l+b).

= 2(40+30)

=2×70

= 140cm