Question

The perimeter of the rectangle is 20 cm. If the length of the rectangle is 6 cm, then its breadth will be:

A. 4 cm
B. 6 cm
C. 10 cm
D. 14 cm​

Answer 1

Answer:

A. 4cm

Step-by-step explanation:

Given:

l = 6cm

Perimeter = 20cm

The perimeter of a rectangle = 2(l + b)

20cm = 2(6 + b)

6 + b = $\frac{20}{2}$

6 + b = 10

b = 10 - 6

b = 4cm

Answer 2

Answer:

Breadth of the rectangle is 4cm

Step-by-step explanation:

Perimeter of rectangle = 2(l + b)

20 = 2(6+b)

20 = 12 + 2b

20 - 12 = 2b

8 = 2b

8/2 = b

4 = b

Check:

perimeter of rectangle = 2(l + b)

2(6 + 4)

12 + 8

20