The area of a rectangular field is 396 m2, whose sides are in the ratio of 11 : 9. What is the perimeter of the rectangular field?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 80 m.
Let sides be 11x and 9x
Area = 11x × 9x = 99x2
99x2 = 396
⇒ x2 = = 4
⇒ x = 2
Sides = 22 m and 18 m
Perimeter = 2(22 + 18) = 2 × 40 = 80 m