Question

area of rectangle is 21 square if the perimeter of the rectangle is 20 find the length and the breadth of the rectangle the length is greater than breadth

Answer 1

Answer:

Breadth = 7cm

Length = 3cm

Step-by-step explanation:

Area of rectangle = 21sq.

Area = L×B

L×B = 21 eq1

Perimeter = 20

perimeter = 2×L+B

20 = 2×L+B

L+B = 10 eq2

L = 10-B

put L in eq1

L×B=21

(10-B)×B=21

10B -B²=21

B²-10B+21

by splitting the middle term

B²-7B-3b+21

B(B-7) -3(B-7)

(B-7) (B-3)

B=7 ,B=3

put B=3 in

eq2 L+B = 10

L+(3)=10

L=7

Finall Answer

B=3

L=7