The cost of diamond varies directly as the square of its weight. A diamond broke into four pieces with weights in the ratio 4 : 5 : 6 : 7. if the loss in the total value of the diamond was Rs. 179,000. The price of the original diamond was?
Let the weight of the pieces of diamond be 4x, 5x, 6x, 7x Total weight of diamond = 4x + 5x + 6x + 7x = 22x Price ∝ (weight)2 => Price = k(weight)2 ; where, K is constant Original price = k(22x)2 Price of pieces = (16kx2 + 25kx2 + 36kx2 + 49kx2) = 126kx2 Loss in price = 484kx2 – 126kx2 = 358kx2 which is given as 179,000 => 358kx2 = 179000 => kx2 = 500 Original price = 484kx2 = 484 x 500 = 242000
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