Question

answer it and explain please

need step by step explaination​

Answer 1

Answer:

21×5=105 cm

Step-by-step explanation:

isko acche se likhiye

Answer 2

Answer:

ans is length=7 cm and breadth=3 cm

Step-by-step explanation:

now suppose breadth=x so length is x+4

now area=x×(x+4)=21

x^2+4x-21=0

(x+7)(x-3)=0

so x=3

now length=3+4=7cm

breadth =3 cm