Length of a rectangle is twice its breadth. Perimeter is $30$ cm. Length is

Length of a rectangle is twice its breadth. Perimeter is $30$ cm. Length is
  1. $10$ cm
  2. $5$ cm
  3. $15$ cm
  4. $20$ cm

Solution

$L = 2B$. $2(L+B) = 30 \Rightarrow 2(3B) = 30 \Rightarrow B = 5$. $L = 10$.

Asked in: MH-SSC-9

Practice more Linear Equations in Two Variables questions on Aicharya