# 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?

#### 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