A thin silver disc of diameter 10cm cost #3300.what is the cost per Sq m
1 m = 100 cm
10 cm = 10 / 100 m = 0.1 m
Area of disc:
A = d² π / 4 = 0.1² ∙ π / 4 = 0.01 ∙ π / 4 = 0.007853981634 m²
Cost:
# 3 300 / 0.007853981634 m² = 420 169.05 # / m²
explain more about this question.
I hope d ans is correct and I need more working on it
To find the cost per square meter, we need to calculate the area of the silver disc and then divide the total cost by that area.
First, let's calculate the area of the disc.
The area of a circle can be calculated using the formula:
Area = π * r^2
where π (pi) is a mathematical constant approximately equal to 3.14159, and r is the radius of the circle.
Given that the diameter of the disc is 10 cm, the radius (r) can be calculated by dividing the diameter by 2:
r = 10 cm / 2 = 5 cm
Now, we can calculate the area using the formula:
Area = 3.14159 * (5 cm)^2
= 3.14159 * 25 cm^2
≈ 78.54 cm^2
Next, we need to convert the area from square centimeters to square meters.
Since 1 square meter is equal to 10,000 square centimeters, we can divide the area by 10,000:
Area (in square meters) = 78.54 cm^2 / 10,000 cm^2
= 0.007854 square meters
Finally, we can find the cost per square meter by dividing the total cost by the area:
Cost per square meter = #3300 / 0.007854 square meters
≈ #419,964.30 per square meter
Therefore, the cost per square meter of the thin silver disc is approximately #419,964.30.