Answer:
B
Step-by-step explanation:
ac =5x
cb=7x
(5x×5x)+ (5 +7)^2 = 7x^2
25x^2+144=49x^2
x=kök 6
ac =5kok 6
(5kok6)×12÷2= 30 kök 6
Positive if it is an increase.
Does that help? Idrk what ur asking
Answer:
width of the river is 60.16 m
Step-by-step explanation:
Refer the attached figure
AB = width of river
We are required to find the width of river .
Since we are given that . Trigonomos spotted a tree across the river and marked the spot directly across from it.
Then he walked to the another point 15 meters down the river .i.e. BC = 15 m
He also found the angle between his side of the river and the line connecting him to the tree i.e. ∠ACB = 76°
So, now to calculate the width of river i.e. AB , we will use trigonometric ratio
Thus the width of the river is 60.16 m