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A gas pycnometer is a laboratory device used for measuring the density — or more accurately the volume — of solids, be they regularly shaped, porous or non-porous, monolithic, powdered, granular or in some way comminuted, employing some method of has displacement and the volume-pressure relationship known as Boyle's Law.
A sum when invested at a certain rate of simple interest becomes 3 times itself in 25 years. Find the rate of interest.
If interest is compounded half-yearly, then find the compound interest on Rs. 8,000 at the rate of 20% per annum for 1 year.
A sum is lent on compound interest for 2 years at 14% p.a. If the compound interest on the sum is Rs.4194.4, find the sum.
A certain sum of money becomes Rs. 1250 in 1 year and 2500 in 3 years at certain rate of simple interest. Find the sum of money invested.
How long will a sum of money take to double, if it is invested in 9% p.a. simple interest?(approx).