Question

Find the the length and area of a rectangle which breadth is 12 metre and perimeter is 50 metre

Answer 1

Answer:

P=2(l+b)

50=2(l+12)

25=l+12

⇒l=13cm

∴

Area = lb

=13×12

=156cm

2

Answer 2

Answer:

=> Length = l

=> p = 2 × (l + b)

=> 50m = 2 × (l + 12m)

=> 50/2 = l + 12

=> 25 = l + 12

=> 25 - 12 = l

=> 13m

Therefore 13m is the length

area => 13 × 12

=> 156m