Question
$\triangle DEF$ is an equilateral triangle. seg DP$ \perp$ side EF , E-P-F. Prove that : $DP ^2=3 EP ^2$
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Answer
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$\text { Simple interest }=\frac{P \times R \times N}{100}$
Simple interest after 1 year $=\frac{1000 \times 10 \times 1}{100}=\square$
Simple interest after 2 year $=\frac{1000 \times 10 \times 2}{100}=\square$
Simple interest after 3 year $=\frac{\square \times \square \times \square}{100}=300$
According to this the simple interest for $4,5,6$ years will be 400, $\square$ $\square$ respectively.
From this $d =$ $\square$ and $a =$ $\square$
Amount of simple interest after 20 years
$t_n+a+(n-1) d $
$t_{20}=\square+(20-1) \square $
$t_{20}=\square$
Amount of simple interest after 20 years is $=$ $\square$
→$\text { Simple interest }=\frac{P \times R \times N}{100}$
Simple interest after 1 year $=\frac{1000 \times 10 \times 1}{100}=\square$
Simple interest after 2 year $=\frac{1000 \times 10 \times 2}{100}=\square$
Simple interest after 3 year $=\frac{\square \times \square \times \square}{100}=300$
According to this the simple interest for $4,5,6$ years will be 400, $\square$ $\square$ respectively.
From this $d =$ $\square$ and $a =$ $\square$
Amount of simple interest after 20 years
$t_n+a+(n-1) d $
$t_{20}=\square+(20-1) \square $
$t_{20}=\square$
Amount of simple interest after 20 years is $=$ $\square$