the sum of money compounded annually at the rate of compound interest becomes 4080 400 in 2 years and 5324 in 3 years that in annual interest rate is
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In △ABC
AB, BC and AC touches the circle at the point P, Q and R respectively.
∴ BC+AP=AC+PB
⟹ 13+7=AC+PB
⟹ AC=20−PB
Perimeter of △ABC=AB+BC+AC
=AP+PB+13+20−PB
=7+13+20=40
∴ Perimeter of △ABC is 40 cm.
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