Railways PYQCBT 1 2020

RRB NTPC · Question 83

In a rectangle, the length is twice the breadth and the perimeter of the rectangle is 48 cm. The area of the rectangle is:

  1. 288 cm^2

  2. 128 cm^2

  3. 512 cm^2

  4. 144 cm^2

Show answer & explanation

Answer: (B) 128 cm^2

Explanation

With length 2b, perimeter = 2(2b + b) = 6b = 48, so b = 8 and l = 16. Area = 128 cm².