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3 years ago

6

The distance around the wheel of a truck is 9.42 feet .what's the diameter of the wheel

1 answer:

kap26 [50]3 years ago

7 0

To solve this problem, you must follow the proccedure that is shown below:

1. You need to apply the formula for calculate the perimeter of a circle, which is:

P=2πr

P is the perimeter of the circle (P=9.42 feet).
r is the radius of the circle.

2. Now, you must clear the radius "r" from P=2πr, as below:

P=2πr
r=P/2π

3. When you substitute the values, you obtain:

r=P/2π
r=9.42 feet/2π
r=1.49 feet

4. Now, you can calculate the diameter (D):

D=2r
D=2(1.49 feet)
D=2.98 feet
<span>
What's the diameter of the wheel?

The answer is: </span><span>2.98 feet</span>

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A circular pond 24 yd in

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Answer:

The walk will cost $8164.

Step-by-step explanation:

Given:

Diameter of the circular pond (D) = 24 yd

Width of the gravel path (x) = 2 yd

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Now, radius of the circular pond is half of the diameter and is given as:

$Radius,R=\frac{D}{2}=\frac{24}{2}=12\ yd$

Now, area of the pond is given as:

$A_{pond}=\pi R^2=3.14\times (12)^2=3.14\times 144=452.16\ yd^2$

Area of the complete path including the pond area is given as:

$A_{outer}=\pi(R+x)^2=3.14\times(12+2)^2=3.14\times196=615.44\ yd^2$

Now, area of the gravel path can be obtained by subtracting the pond area from the total outer area. This gives,

$A_{path}=A_{outer}-A_{pond}\\\\A_{path}=615.44-452.16=163.28\ yd^2$

Now, using unitary method,

Cost of 1 square yard of path = $50

∴ Cost of 163.28 square yard of path = 50 × 163.28 = $8164

Hence, the walk will cost $8164.

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aleksandr82 [10.1K]

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Answer:

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Step-by-step explanation:

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