1.  The length of a plot is four times its breath. A playground measuring 1200 square meters occupies one third of the total area of a plot . what is the length of the plot in meters ?
A. 20
B. 30
C. 60
D. None of these

Answer: Option D

Explanation:

Area of the plot = (3 x 1200) m2

= 3600 m2

Let breadth = y meters

Then Length = 4y meters,

Now area = 4y x y = 3600 m2

⇒ y2 = 900 m2

⇒ y = 30 m

∴ Length of plot = 4y m

= (4 x 30) m

=120 m