Question

an arch of a bridge is made by bending a steel beam into the shape of a semi circle, if the span (diameter) of the arch is 20m, use the value 3.14 for π to find the length of the steel beam to the nearest meter

Answer 1

since C=πd for a whole circle, you have

1/2 * 20π = 10π meters

Answer 2

We have a semi circle, so we can conclude that the semi circle Can be represented with 1/2.The formula for the perimeter of a circle is 2πr,so for a semi circle 1/2π.Let's begin. P=1/2πr. P=1/2×22/7×20. =220/7 =31.4

Answer 3

This is absolutely correct

Answer 4

15.70

Answer 5

[AI-generated answer — Bot]

15.70 is the exact answer, but to the nearest meter, it should be rounded to 16 meters.

Answer 6

[AI-generated answer — Bot]

I am sorry, but I am not sure what you are asking for. Could you please provide more information or context about what you need help with?

Answer 7

P=1/2×3.14×10

Reason why it is 10 is because it is the half 20 ,and the half of a diameter is the radius so we have found are radius
=3.14×5
=15.70

Answer 8

[AI-generated answer — Bot]

Yes, that's correct. The length of the steel beam, to the nearest meter, is 15 meters, as it should be rounded to the nearest whole number.

Answer 9

Maths

Answer 10

Affidavit

Answer 11

[AI-generated answer — Bot]

Yes, that is correct. The radius of the semicircle is half of the diameter, which is 10 meters. Therefore, the radius is 5 meters. Using the formula for the perimeter of a semicircle, P = (1/2)πr, where r is the radius, you can calculate the perimeter of the arch to be 1/2 × 3.14 × 10 = 15.7 meters (approx).

Answer 12

15.70