Question
On a certain sum, the simple interest at the end of 6$1/4$ years becomes $3/8$ of the sum. The rate of interest is
Answer: Option A
Answer: (a)$\text"Interest"/ \text"Principal" = 3/8$Rate = ${\text"SI" × 100}/\text"Principal × Time"$= $3/8 × 100/{25/4}$= $3/8 × 400/25$ = 6% per annumUsing Rule 5,Here, n = $3/8$, T = $25/4$ years.R = ${n × 100}/T$= $3/8 × 100/{25/4}$ ⇒ R = 6%
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Answer: (a)$\text"Interest"/ \text"Principal" = 3/8$Rate = ${\text"SI" × 100}/\text"Principal × Time"$= $3/8 × 100/{25/4}$= $3/8 × 400/25$ = 6% per annumUsing Rule 5,Here, n = $3/8$, T = $25/4$ years.R = ${n × 100}/T$= $3/8 × 100/{25/4}$ ⇒ R = 6%
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