Question

The length of a rectangle is greater than its breadth by 4 cm and its perimeter is 20 cm. Then, length and breadth of the rectangle are respectively.​

Answer 1

Answer:

L = 7

B = 3

Step-by-step explanation:

L = B + 4cm

2(L+B) = 20cm

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L - B = 4  ---------  1

L+B = 20/2

L+B = 10 ---------- 2

adding equation 1 and 2 ---->

2L = 14

L = 14/2

L = 7

now put L = 7 in equation 1 or 2

here I'm ptting in equation 2

B+7 = 10

B = 10 - 7

B = 3

HOPE IT HELPED.....!!

Answer 2

Step-by-step explanation:

let be the length=4cm

_______braedth= x

let be the length of rectangle is greater than =x+4

perimeter of rectangle=20cm

perimeter of rectangle=2×length+2×breadth

20 = 2×4+2×breadth

20= 8+2×breadth

$\frac{20}{2 } = 8 + breadth$

10×8+breadth

$80 = breadth$

Therefore, length of rectangle is greater than x+4

80+4

$84 = length$