Multiple choice question XI — task. Science CBSE, Class 9.

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1. Relative density of a solid is:

\(R.D\ =\ \frac{Density\ of\ substance}{Density\ of\ water}\)
\(R.D\ =\ \frac{Weight\ of\ certain\ volume\ of\ substance}{Weight\ of\ same\ volume\ of\ water}\)
\(R.D\ =\ \frac{Weight\ of\ substance}{Density\ of\ water}\)
All of the above

2. Archimedes principle is used to:

design ships
design Submarines
design Lactometers
all of them

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