The length of the shadow of a pole on level ground increase 90m, when the angle of elevation of the sum changes from 58-38.calcu
late the height of the pole, correct to 3sf
1 answer:
Answer: h = 137.4 metres
Step-by-step explanation:
Given that the length of the shadow of a pole on level ground increase 90m, that is, (x + 90)m will be the total length of the shadow. Also we are given that the angle of elevation of the sum changes from 58-38.
To calculate the height, we will employ trigonometry ratio. SohCahToa which are: tan 58 and tan 38.
Please find the attached files for the solution
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Answer:
C. 134.04
Step-by-step explanation:
The formula to calculate the volume of the cone is:
+) <em>Volume of a cone = 1/3 x Area of base x Height</em>
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The base of the cone is a circle, so that the formula to calculate the are of the base is: <em>Area of base = </em> x
The radius of the base is 4cm
=> <em>Area of base = </em> x 4^2 = 3.14 x 16 = 16
The height of the cone is given equal to 8 cm
So the volume of the cone is:
+) <em>Volume of a cone = 1/3 x Area of base x Height = 1/3 x 16</em><em> x 8 = 134.04 </em>
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So the answer is C