A boy purchases 2 litre of milk from a shop. To find out the extent of adulteration he constructed a device by using a capillary tube (T) and a cylindrical container (C ) as shown in the figure. In order to make the device float upto a mark (M), in pure milk, he adds 10 lead shots each of mass 5 g into it. To make the device float to the same mark in a sample of milk purchased, he removes one lead shot from it. The total weight of the device is 200 gwt. Determine the density of a dultered milk that the shopkeeper adds to the milk. Density of pure milk is `1.045" g cm"^(-3)` and density of water is `"1 g cm"^(-3)`.

Explanation

Weight of the device + Weight of the lead shots = Volume of milk displaced `xx` Density of milk
`W+wxx=vxxd_(m)` (1)
`W+wxxy=vxxd_("impure milk")`
Compare (1) and (2) and determine `d_("impure milk")`