Math, asked by Aɾꜱɦ, 8 months ago

A TV was bought at a price of 21,000. after one year the value of the TV was depreciated by 5%(Depreciation mean reductions of value due to used and age of item).find the value of TV after one Year?

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Answers

Answered by BrainlySamaira
19

{ \huge \bf{ \mid{ \overline{ \underline{\red {A\green n\purple s\pink wer}}}} \mid}}

\small\underline\textsf{\red{ the value of TV after one Year}=\underline{19,950}}

\small\underline\frak{Given}

\sf \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: pricipal = rs.21000 \\\sf \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:reduction = 5\% \: of \: 21000 \: per \: year

\small\star\underline\frak{to \:find :- }

\small\underline\textsf{the value of TV after one Year}

\huge\underline\textsf{Explantion:-}

\boxed{\boxed{\underline{\sf{\frac{21000 \times 5 \times 1}{100}  = 1050}}}} \\

\sf value \: at \: the \: end \: of \: 1 \: year \\\sf \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:= 21000 - 1050 = 19,950

 \rule{300}{2}

\huge\underline\frak{Alternately:- }

\small\underline\textsf{we \: may \: directly \: get \: this \: as \: follows}

\sf value \: at \: the \: end \: of \: 1 \: year = \boxed{(1 -  \frac{5}{100})}

\boxed{\boxed{\boxed{\sf 21000 \times  \frac{19}{20}}}}  \\

\star\sf 19,950

Answered by TRISHNADEVI
20

 \huge{ \underline{ \overline{ \mid{ \mathfrak{ \purple{ \:   \: SOLUTION \:  \: } \mid}}}}}

\boxed{\bold{\: \: METHOD \: \: 1 \: : \to \: \: }}

 \underline{ \mathfrak{ \:  \: Given, \:  \: }} \\  \\  \bold{ \pink{Initial  \:  \: value \:  \:  of \:  \:  the \:  \:  TV, V_0 = Rs.  \: 21000}} \\  \\  \bf{  \blue{Rate  \:  \: of \:  \:  depreciation, r = 5\%}} \\  \\   \bf{\green{No. \:  \:  of  \:  \: years, n = 1 \:  year}} \\  \\  \underline{ \mathfrak{To \:  \:  find : \to \: }} \\  \\  \bold{ \red{Value \:  \:  of  \:  \: the \:   \: TV  \:  \: after  \:  \:1 \:  \:  year, V_n = ?}}

   \underline{ \mathfrak{ \:  \:We \:  \:  know \:  \:  that, \:  \: }} \\  \\\:  \:  \:  \:  \:  \:  \:  \:  \:  \: \boxed{\bf{ \pink{V_n = V_0 ( 1 -  \frac{r}{100} ) {}^{n} }}}

Using the formula,

 \tt{V_n = V_0 ( 1 -  \frac{r}{100} ) {}^{n} } \\  \\   \:  \:  \:  \:  \:  \tt{= 21000 \times (1 -  \frac{5}{100} ) {}^{1} } \\  \\  \:  \:  \:  \:  \:  \tt{= 21000 \times ( \frac{100 - 5}{100} )} \\  \\  \:  \:  \:  \:  \:  \tt{= 21000 \times  \frac{95}{100}}  \\  \\ \:  \:  \:  \:  \:  \tt{ =  \frac{1995000}{100}}  \\  \\  \:  \:  \:  \:  \:  \tt{= 19950}

 \therefore \text{The value of the TV after 1 year @ of 5\% } \\  \text{depreciation =  \red{Rs. 19950}}

 \underline{ \underline{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \: \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: } }

\boxed{\bold{\: \: METHOD \: \: 2\: : \to \: \: }}

 \underline{ \mathfrak{ \:  \: Given, \:  \: }} \\  \\  \bold{ \green{Initial  \:  \: value \:  \:  of \:  \:  the \:  \:  TV, V_0 = Rs.  \: 21000}} \\  \\  \bf{  \blue{Rate  \:  \: of \:  \:  depreciation, r = 5\%}} \\  \\   \bf{\pink{No. \:  \:  of  \:  \: years, n = 1 \:  year}}

 \sf{ \therefore \: Amount \:  \:  of \:  \:  depreciation = 5\%  \:  \: of  \:  \: Rs. \: 21000 } \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf{(in \:  \:  \: 1 \:  \: year) } \\   \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \sf{= Rs.( \frac{5}{100}  \times 21000) } \\  \\ \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \sf{ = Rs. (\frac{105000}{100} )} \\  \\  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf{ =Rs. \:  1050}

 \therefore \:  \text{Value of the TV after 1 year = Initial value of the  } \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \text{TV - Amount of depreciation in 1 year} \\  \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \text{ = Rs.(21000 - 1050)} \\  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \text{ = \red{ Rs. 19950}}

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