find the rate of interest by which a sum will triple itself in 16 years
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Time = 16 years
Principal = p
Rate = r
Now,
SI = p*r*16/100
= pr*4/25
Now,
Amount = 3p
So,
3p = p + p*r * 4/25
Or, 2p = p*r*4/25
Or, p*r = 2p*25/4
Or, p*r = 25/2 *p
Or, r = 25/2 = 12.5 %
Hope this will be helping you.
:)
Principal = p
Rate = r
Now,
SI = p*r*16/100
= pr*4/25
Now,
Amount = 3p
So,
3p = p + p*r * 4/25
Or, 2p = p*r*4/25
Or, p*r = 2p*25/4
Or, p*r = 25/2 *p
Or, r = 25/2 = 12.5 %
Hope this will be helping you.
:)
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