The price of gold is directly proportional to the square of its weight. It being sold after breaking in the ratio of 3 : 2 : 5 therefore earned a loss of ₹1240. The price of gold before breaking is

2000

Price of gold = ( weight of gold)²

               I   :   II   :   III  :  Actual

weight ⇒  3   :   2    :    5   :     10

Price   ⇒  3²  :   2²   :   5²   :    10²

          ⇒  9  :   4    :    25    :     100

Now,

Actual Price = 100

Price after break = (9 + 4 + 25) = 38

Loss  = 100 - 38 = 62R

⇒ 62R = 1240 (given)

⇒  1R  =  20

Hence,

Actual Price = 100 × 20 = 2000/-