1.  The cost of cultivating a square field at the rate of Rs. 160 per hectare is Rs. 1440. the cost of putting a fence around it at 75 paisa per meter is ?
A. ₹ 900
B. ₹ 1800
C. ₹ 360
D. ₹ 810

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