The ratio between the length and the breadth of a rectangular plot is 7 : 5. If the perimeter of the plot is 144 metres, what is its area?
Options
A) 1320 sq.metres  B) 1260 sq.metres  C) 1280 sq.metres  D) 1380 sq.metres  E) None of these
Let the length and breadth be 7x and 5x respectively.   Then, P = 2(7x + 5x) = 144 ⇒ x = 6   Area = 7 × 6 × 5 × 6 = 1260 sq.m.   Answer 1260 sq.metres
<result>B</result>
The ratio between the length and the breadth of a rectangular plot is 7 : 5. If the perimeter of the plot is 144 metres, what is its area?