Question

CIA
ANS 2
7. The length of a plot is four times its breadth. A play ground measuring 1200 sq. m. occupies one.
third of the total area of the plot. What is the length of the plot.
(4) None
(3) 60 m
(1) 20 m
(2) 30 m
​

Answer 1

D. None

Step-by-step 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

I hope it will help you.

Answer 2

Answer:

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