b) 31.42 meters
c) 10.47 meters
d) 2.09 meters
The length of the arc captured by a central angle of 120 degrees in a circle with a radius of 5 meters is approximately 10.47 meters. Hence, the correct answer is an option (c) 10.47 meters.
Arc is the measure of the angle on the circumference of a circle.
Length of an Arc = θ × (π/180) × r
Here,
The length of an arc of a circle with radius r and central angle θ (in radians) is given by the formula:
Length of arc = r × θ
To use this formula, we need to convert the given central angle of 120 degrees to radians:
θ = (120/180) × π = 2/3 × π
Now, we can substitute the given values into the formula to get the length of the arc:
Length of arc = 5 × (2/3 × π) = (10/3) × π ≈ 10.47 meters
Therefore, the length of the arc captured by a central angle of 120 degrees in a circle with a radius of 5 meters is approximately 10.47 meters. Hence, the correct answer is an option (c) 10.47 meters.
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(x+4)(x+4)
(d+7)(d+1)
Answer: This is a problem of inverse variation, where the number of days that the food lasts is inversely proportional to the number of soldiers in the fort. We can use the formula:
d = k / s
where d is the number of days, s is the number of soldiers, and k is a constant of proportionality. We can find the value of k by using the initial information:
48 = k / 1500 k = 48 * 1500 k = 72000
Now we can use the information after 13 days to find the new number of soldiers. Let x be the number of soldiers who joined the fort. Then we have:
25 = 72000 / (1500 + x) 25 * (1500 + x) = 72000 37500 + 25x = 72000 25x = 34500 x = 1380
Answer: The number of soldiers who joined the fort after 13 days is 1380.