B is decreased by 40% and decreased again by 40%. What is the result?
1 answer:
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Answer:
y = 25.20 m
Step-by-step explanation:
By applying tangent rule in ΔABC,
tan(25)° =
=
BC = --------(1)
Now we apply tangent rule in ΔABD,
tan(15)° =
tan(15)° =
BC + 40 =
BC = - 40 -------(2)
From equation (1) and (2),
y(2.1445 - 3.7321) = -40
1.5876y = 40
y = 25.1953
y ≈ 25.20 m
Therefore, measure of y is 25.20 m.
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