the compound interest on a certain sum for 2 years is rupees 40 point 80 and simple interest is rupees 40 find the rate of interest per annum and the sum
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tnwramit1:
then there is only increase in interest because we take interest on last year intrest
so that is. 80
. 80 is what %of 20
if u calculate it u will get the rate %
that is 4%
for sum 20 is 4% of sum then sum =500
hope I it clear ur doubt
if not then u can ask
thanks
np
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