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In What Time Will the Interest on a Certain Sum of Money at 6% Be 5/8 of Itself? - Mathematics

Sum

In what time will the interest on a certain sum of money at 6% be `5/8` of itself?

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Solution

Let P = Rs.8

Interest = Rs.`8xx5/8` = Rs.5

R = 6%

T =`(100xx"I")/("P"xx"R")`

`=(100xx5)/(8xx6)`

`=500/48=125/12` years

`=10 5/12` years

= 10 years 5 months

`[∵ 5/12"year"=5/12xx12  "months"=5  "momths"]`

∴ Time = 10 years 5 months

Concept: To Find the Principle (P); the Rate Percent (R) and the Time
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 9 Interest
Exercise 9 (A) | Q 10 | Page 106
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