The volume of a circular cylinder is calculated using the formula = ^2*2ℎ. If the height ℎ is known to be equal to the diameter 2 and ℎ is measured at a percentage error of 2%, find the percentage error in calculating the volume of the cylinder.

6%

Step-by-step explanation:

From the information given:

The height h is said to be equal to the diameter which is 2r

h = 2r

r = h/2

Recall that: The volume for calculating a circular cylinder is:

Thus, the percentage error of the height can now be calculated as:

Now taking the differential of the volume, we have:

FInally, the %age change in the volume is calculated as follows:

Thus;  the percentage error in calculating the volume of the cylinder is 6%

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

50- 250 is correct i did that one too

step-by-step explanation: