The radius of a sphere was measured to be 30 cm with a possible error of 0.5 cm.(a) Use differentials to estimate the maximum error in the calculated surface area.
Question
The radius of a sphere was measured to be 30 cm with a possible error of 0.5 cm.(a) Use differentials to estimate the maximum error in the calculated surface area.
Solution
The formula for the surface area of a sphere is A = 4πr².
First, we need to find the differential of the surface area with respect to the radius. This is done by taking the derivative of the surface area function with respect to r.
dA/dr = 8πr
Next, we substitute the given radius and the possible error into the differential equation.
dA = (8πr)dr = 8π(30 cm)(0.5 cm) = 120π cm²
So, the maximum error in the calculated surface area is 120π cm².
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