If the length of one side of a rectangle is twice that of the other side, and its perimeter is 54 cm, then what is the length of the longer side of this rectangle?
Answer & explanation
Correct answer: option 4
We know that,
Perimeter of rectangle = 2 ( l + b)
We have,
Perimeter = 54 cm
⇒ According to the given Question,
Length of the longer side = twice of breadth
Let the breadth be a
Then, length = 2a
= Perimeter = 2 (l +b)
= 54 = 2( 2a + a)
= 54 = 6a
= a = 9
Hence, length of the longer side = 2a = ( 2 × 9) = 18 cm