Why do you divide each term in the sum by the same factor that you pull out of the sum?
1 answer:
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Answer:
BC ≈ 14.7 m
Step-by-step explanation:
Using the Sine rule in Δ ABC
=
To find ∠ A subtract the 2 given angles from 180°
∠ A = 180° - (90 + 28)° = 180° - 118° = 62°
Then
=
( cross- multiply )
BC × sin28° = 7.8 × sin62° ( divide both sides by sin28° )
BC = ≈ 14.7 m ( to 3 significant figures )
The formula of the Lateral Area of a cylinder is:
Lateral Area = 2
rh
=2(12)(60) (altitude is 5×radius)
(5×12=60)
=4523.9 mm² ≈ 4524 m²
Answer is D. 4524 m²
Lateral Area = 2
=2
(5×12=60)
=4523.9 mm² ≈ 4524 m²
Answer is D. 4524 m²