Question

THESE QUESTION IS FROM THE CHAPTER QUADRATIC EQUATIONS CLASS 10TH..

RIGHT ANSWER WILL BE MARKED BRAINLIEST AND I WILL ALSO FOLLOW U

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ANSWER
THANKS

Answer 1

Step-by-step explanation:

peremeter = 2(l+b)

area=lb

400=lb

l+b=80/2=40

l=400/b

800/b+b=40

b²-40b+400=0

(b-20)²=0

b=20

then put b in equation of area we get

l=20

thank you

Answer 2

Answer:

Step-by-step explanation:

Answer is given below in the pic