Question

find least count if density is given

Answer 1

first find mass then with you find least count

Answer 2

Least count of a measuring instrument is the least value of physical quantity that can be measured accurately using the instrument.  Example:   Consider a spring balance whose range is 0-25kg. In its scale, you can see that the 1kg is divided into 10 equal parts. Therefore, the least value it can measure is 100g which can be found out by, Measurement =1kg Number of divisions = 10 Least count =1/10 = 0.1kg or 100g  100g is the least count of the spring balance. Similarly we can find the least count of different spring balances of different range.