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बिन्दुओं (4, 3, 7) और (1, -1, -5) के बीच की दूरी है

(A) 13

(B) 15

(C) 12

(D) 5

1 Answer

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Best answer

सही विकल्प है (A) 13

दूरी = \(\sqrt {(x_1 -x_2)^2 + (y_1 - y_2)^2 + (z _1 - z_2)^2}\)

\(= \sqrt{(4 - 1)^2 + (3 - (-1))^2 + (7 - (-5))^2}\)

\(= \sqrt{3^2 + 4^2 + 12^2}\)

\(= \sqrt{9 + 16 + 144}\)

\(= \sqrt{169}\)

\(= 13\)

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