Math, asked by ridimakc123, 6 months ago

The compound interest calculated yearly on a sum of money for first 1 year is rs.400 and for first 2 years is rs.832. calculate the rate of interest and the sum invested.

Answers

Answered by itsmeshivam1098
0

Step-by-step explanation:

let principle and rate be P and R

for 1st year

SI = P×R×T/100

400 = P×R×1/100

40000/P = R _____(i)

for second year

principle = principle + interest

= P + 400

SI = (P+400)×R×T/100

832 = (P+400)×R/100

83200/(P+400) = R _____(ii)

From (i) and (ii)

40000/P = 83200/(P+400)

400(P+400) = 832P

400P+160000 = 832P

832P - 400P = 160000

432P = 160000

P = 160000/432

P = 370.37

Putting value of P in equation (i)

R = 40000/370.37

R = 108 % approx

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