Question

no. 4
5
6
7
8
9.



plz anyone solve it fast step by step.....
its important ...
plz......​

Answer 1

please mark it as brainliest

Answer 2

4)
Given:
The area is 84m^2

length - breadth is 5m

Therefore,
l = b + 5

area of rectangle is lb

so,
84 = (b + 5)b

84 = b^2 + 5b

b^2 + 5b - 84

b^2 + 12b - 7b - 84

b (b + 12) - 7 (b + 12)

(b - 7) or (b + 12)..... rejected because dist. can't be negative.

breadth is 7m

length is 7 + 5 = 12 m

perimeter of rectangle is 2 (l +b)

= 2 (12 + 7)

= 2 × 19

= 38 m