Question

find the rate of interest for the following simple interest 115.50 principal 1680 time 10 month solve step by step
simple interest​

Answer 1

Answer:

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Answer 2

$\mathsf \red{Given : \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: } \\ \\ \mathsf{S.I \: = \: 115.50 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: } \\ \\ \mathsf{principal \: (P)\: = \: 1680 \: \: \: } \\ \\ \mathsf{time \:(T) \: = \: 10 \: months } \\ \\ \mathsf \red{let \: \: \: rate \: of \: interest \:(R) \: = \: x \: \% } \\ \\ \boxed{ \mathsf \blue{S.I \: = \: \frac{PTR}{100} }} \\ \\ \mathsf{115.5 \: = \: \frac{1680 \times 10 \times x \: \%}{100} } \\ \\ \mathsf{x \: \% \: = \: \frac{115.5}{168} } \\ \\ \mathsf{x \: \% \: = \: \frac{1155}{1680}} \\ \\ \boxed{ \mathsf{x \: \% \: = \: 0.68}} \\ \\ \mathsf \red{ \therefore \: rate \: of \: interest \: = \: 0.68}$