you are given solid cubes of aluminium and iron, each of side 4 cm, and 2 spring balances. Balance A has a range of 0 to 250 g and a least count of 2.5 g, while balance B has a range of 0 to 1000 g and a least count of 10 g. The preferred option of mass measurement would be to use:

  1. balance A for both the cubes.
  2. balance B for both the cubes.
  3. Balance A for aluminium cube and balance B for iron cube.
  4. Balance A for iron cube and balance B foraluminium cube.

Density of iron is greater than aluminum. While preferring a smaller least count, we should estimate the range needed for a given measurement and select accordingly. So option (C) " Balance A for aluminum cube and balance B for iron cube" is correct.

  • 5

 coreect answer is -

balance A for alluminium cube and balance B for iron cube 

explanation-

since mass of iron is probably more than mass of aluminium so there should be high range of spring balance for iron and less range for aluminium 

hope it helps

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