Question

The length of runner chord increases to 60cm under a weight of 100g

Answer 1

Answer:

Now according to the question rubber cord increases 60 cm when weight of 100 gm is applied and increases to 70 cm when weight of 120 gm is suspended . Now let us again take that the weight be Y under which the length of the cord will become 74 cm . So to get 74 cm the weight needed is 128 g.