plss answer this question plssssssss.........
at what rate percent compound interest per annum will rs 640 amount to rs774.40 in 2 years
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here is ur answer ➖➖➖➖➖➖➖➖➖➖➖➖➖⬇
Given Principle(P) = Rs 640
Amount (A)= Rs 774.40
time (n) = 2 years
A = P(1+r/100)^n
⇒ 774.40 = 640(1+r/100)²
⇒ 774.40/600 = ([100+r]/100)²
⇒ 1.21 = ([100+r]/100)²
⇒ √1.21 = (100+r)/100
⇒ 1.1 = (100+r)/100
⇒ 1.1*100 = 100+r
⇒ r = 110 - 100 = 10%
Rate of interest = 10%
hope it helps you...
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angelprinces46:
tnx
{formulae=A=P[1+1/4{r/100}
answer=C.I RS 1951
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