Math, asked by ritachaudhary479, 3 months ago

Find the rate of interest when Rs 1250 amount to Rs 1400 in 3 year​

Answers

Answered by Anonymous
1

heya..!!

Your answer..!!

Total interest for two years = 1800 - 1250 - 550

Effective Rate of Interest:

= 550/1250×100 = 44%

Let the Normal Rate of Interest = x%

using the relation A+B+AB/100

x+x+x^2/100= 44

x^2 + 209x - 20x - 4400 = 0

x(x + 200) - 20(x + 220) = 0

(x - 20)(x + 220) = 0

x = 20 or x = -220

But rate of interest can't be negative.

=>x = 20%

A = B = 20

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A = P(1 + r/100)^n

1800 = 1250(1 + r/100)^2

180/125 = (1 + r/100)^2

=>6/5=(1 + r/100)

=>r/100 = 6/5 - 1 = 1/5

=> r = 20%

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hope it's help u..!!!

mark as brainliest answer..!!

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