Traditional Culture Encyclopedia - Photography major - Yangtze river photography
Yangtze river photography
Solution: (1) 3,25,5,15;
(2) Solution 1: Let CN and DE intersect at h.
Meaning: MF=AC=x, DH = 75-X.
∵CN//AF，△DMN∽△DAF
∴
∴y=8- X;
Solution 2: According to (1), the speed of A→B (downstream) is 25km/h, and the speed of B→A (countercurrent) is 15km/h, so y is the round trip of the ship.
C, b time
y=
Namely;
(3) When x=25, y= (hours).
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