Question

5. The perimeter of a rectangle 1 point
is 20 cm . If the length of the
rectangle is 6 cm, then it's
breadth wil be *
O 4 cm
O
6 cm
10 cm
0 14 cm​

Answer 1

Answer:

4 cm

Step-by-step explanation:

perimeter of rectangle = 2(l+b)

20 =2(6+b)

20 =12+2b

20-12 =2b

8/2 = b

b = 4

Answer 2

Answer:

Breadth of the rectangle is 4cm.

Given:

Perimeter of a rectangle = 20cm.

Length of the rectangle = 6cm.

To find:

Breadth of the rectangle.

Solution:

Let the breadth of the rectangle be x.

Perimeter of rectangle = 20cm.

=> 2(l+b) = 20cm.

=> 2(6+x) = 20cm.

=> 6+x = 20/2

=> 6+x = 10

=> x = 10-6

=> x = 4.

Hence, the breadth of the rectangle is 4cm.

Verification:

Perimeter of the rectangle = 20cm

=> 2(l+b) = 20cm

=> 2(6+4)cm = 20cm

=> 2×10cm = 20cm

=> 20cm = 20cm

Here, LHS = RHS.

Hence, verified.