O ile procent powiększy się pole kwadratu, gdy jego bok zwiększymy o 10% ?
P1 = a^2
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10 % = 0,1
b = a + 0,1 a = 1,1 a
P2 = b^2 = ( 1,1 a)^2 = 1,21 a^2
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P2 - P1 = 1,21 a^2 - a^2 = 0,21 a^2 = 0,21 P1 = 21% P1
Odp.Pole kwadratu zwiekszy się o 21 %.
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P1 = a^2
---------------
10 % = 0,1
b = a + 0,1 a = 1,1 a
P2 = b^2 = ( 1,1 a)^2 = 1,21 a^2
------------------------------------------
P2 - P1 = 1,21 a^2 - a^2 = 0,21 a^2 = 0,21 P1 = 21% P1
Odp.Pole kwadratu zwiekszy się o 21 %.
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