Question

Three persons A, B, C invested their annual savings in a bank at the simple rate of interest 30% per annum.
Each of them gets an equal amount after 15,20 and 25 years respectively. If all together they invested 3 579
lakh in the bank, what was the ratio of their initial investments?
1) 140:110:77 2) 238:179:164
3)140:187:579 4)238:187:154
5)238:187:569​

Answer 1

Answer:

Sorry I didn't know the answer

Answer 2

Answer :-

we know that, when amount is same ,

• 1/(100 + R1T1) : 1/(100 + R2T2) : 1/(100 + R3T3)

given that,

• R1 = R2 = R3 = 30% .
• T1 = 15 years , T2 = 20 years , T3 = 25 years.

so,

→ A : B : C = 1/(100 + 30*15) : 1/(100 + 30*20) + 1/(100 + 30*25)

→ A : B : C = 1/(100 + 450) : 1/(100 + 600) + 1/(100 + 750)

→ A : B : C = 1/550 : 1/700 : 1/850

→ A : B : C = 1/55 : 1/70 : 1/85

→ A : B : C = 1/11 : 1/14 : 1/17

→ A : B : C = (14*17) : (11*17) : (11*14)

→ A : B : C = 238 : 187 : 154 (4) (Ans.)

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