General Questions

Answer: Option C

Explanation:

Area of parallelogram = Base x Height

= 8.06 x 2.08 = 16.76 cm²

Answer: Option A

Explanation:

Let Length = 5y meters and breadth = 3y meters.

Then, perimeter = 2 x (5y + 3y ) m = 16y meters ...(i)

But perimeter = Total Cost / Rate = 3000 / 7.50 m = 400 m ...(ii)

from eqs. (i) and (ii)

16y = 400

⇒ y = 25

∴ Length - Breadth = (5 x 25 - 3 x 25 ) m

= 2 x 25 m

= 50 m

Answer: Option A

Explanation:

Area = 1440 / 160 hectares

= 9 hectares

= 90000 m²

∴ One side = √90000 m

= 300 m

So perimeter = 4 x 300 m

= 1200 m

∴ Cost of fencing = Rs (1200 x 75) / 100

= Rs. 900

Answer: Option A

Explanation:

Let breadth = b meters.

then, length = 3b/2 meters

∴ b x 3b/2 = 2/3 X 10000

⇒ b² = (4 x 10000)/9

⇒ b = ( 2 X 100)/3 m

∴ Length = (3/2) x (2/3) x 100 m

= 100 m

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