Question

The length of a rectangle is twice its breadth. What is the length if the perimeter is 90cm ?
options
30cm
15cm
45cm
10cm​

Answer 1

Answer:

option a: 30cm

Step-by-step explanation:

l=2b(given)

perimeter of rectangle=90

2(l+b)=90

l+b=90/2

2b+b=45

3b=45

b=15cm

substituting the value of b,

l=2b

l=30cm