Question

at what rate percent per annum will a sum of Rs 31250 become a 31 152 in 3/2 to years while the interest compounded half-yearly find the rate of interest annually ​

Answer 1

Answer:

Arpana Wali

Grade 11

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Explanation :

Suppose rate of interest is x

Here its compounded half yearly for 1.5 years

Amount = Principal(1+x/100)(1+x/100)(1+x/100)

31250 = 35152(1+x/100)(1+x/100)(1+x/100)

15625/17576 = (1+x/100)(1+x/100)(1+x/100)

25/26 = 1+x/100

x/100 = 25/26 - 1 = 1/25

x = 4%

Answer : 4% rate of interest

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