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  1. #1
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    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
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by devi View Post
    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
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  3. #3
    A riddle wrapped in an enigma
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    Quote Originally Posted by devi View Post
    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
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