The value of a diamond is proportional to the square of its weight. If the cost of a 5 carat diamond is Rs 225, then what will be the cost of a 9 carat diamond?
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cost of a 5 carat diamond is=₹225
post off 1 carat diamond is =₹225÷5
=₹45
cost of a 9 carat diamond. =45×9
=₹405
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