1. ## Math help

The cost of cultivating square field at the rate of rupees 360 per hectare is rupees 3240. What is the cost of putting a fence around it at 75 paise/ metre.
(a)360
(b)810
(c)900
(d)1800

2. Originally Posted by devi
The cost of cultivating square field at the rate of rupees 360 per hectare is rupees 3240. What is the cost of putting a fence around it at 75 paise/ metre.
(a)360
(b)810
(c)900
(d)1800
hint: a hectare is 10,000 square meters.

i don't know how paise relates to rupees, so you have to deal with that

3. Originally Posted by devi
The cost of cultivating square field at the rate of rupees 360 per hectare is rupees 3240. What is the cost of putting a fence around it at 75 paise/ metre.
(a)360
(b)810
(c)900
(d)1800
3240 rupees total
360 rupees per hectare

$\frac{3240}{360}= 9$ hectares.

9 hectares = 9(10000 metres)= 90,000 square metres

Since the field is square, each side of the field is $\sqrt{90000}=300$ metres.

Fencing to enclose 4 sides of 300 metres would require 1200 metres of fencing.

At 75 paise per meter, that would be 75(1200)= 90,000 paise or 900 rupees.

100 paise = 1 rupee

90,000 paise = 900 rupees